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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q



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|x | Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
|- | ---------------------------------------------------------------------------------------

for the Quarterly Period Ended June 30, 2006

Commission File No. 0-13442



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MENTOR GRAPHICS
CORPORATION

(Exact name of registrant as specified in its charter)



|                                                               |  |                                  
|-------------------------------------------------------------- |  | ---------------------------------
|Oregon                                                         |  | 93-0786033                       
|(State or other jurisdiction of incorporation or organization) |  | (IRS Employer Identification No.)
|                                                               | 
|8005 SW Boeckman Road Wilsonville, Oregon                      |  | 97070-7777                       
|(Address of principal executive offices)                       |  | (Zip Code)                       

Registrants telephone number, including area code: (503) 685-7000



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NO CHANGE

(Former name, former address and former

fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be
filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for
the past 90 days. Yes  x    No ̈

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of accelerated filer
and large accelerated filer in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer  x                    Accelerated Filer ̈Non-accelerated filer ̈

Indicate by check mark whether the registrant is a shell company (as defined
in Rule 12b-2 of the Exchange Act). Yes ̈No  x

Number of shares of common stock, no par value, outstanding as of August 1, 2006: 81,304,176



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##### Table of Contents

MENTOR GRAPHICS CORPORATION

Index to Form 10-Q



|                                                                                                              |  |            
|------------------------------------------------------------------------------------------------------------- |  | -----------
|                                                                                                              |  | Page Number
|PART I FINANCIAL INFORMATION                                                                                  |  |            
|                                                                                                              | 
|Item 1. Financial Statements                                                                                  |  |            
|                                                                                                              | 
|Condensed Consolidated Statements of Operations for the three months ended June 30, 2006 and 2005 (unaudited) |  | 3          
|                                                                                                              | 
|Condensed Consolidated Statements of Operations for the six months ended June 30, 2006 and 2005 (unaudited)   |  | 4          
|                                                                                                              | 
|Condensed Consolidated Balance Sheets as of June 30, 2006 and December 31, 2005 (unaudited)                   |  | 5          
|                                                                                                              | 
|Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2006 and 2005 (unaudited)   |  | 6          
|                                                                                                              | 
|Notes to Unaudited Condensed Consolidated Financial Statements                                                |  | 7          
|                                                                                                              | 
|Item 2.
Managements Discussion and Analysis of Results of Operations and Financial Condition                 |  | 21         
|                                                                                                              | 
|Item 3.
Quantitative and Qualitative Disclosures About Market Risk                                            |  | 35         
|                                                                                                              | 
|Item 4.
Controls and Procedures                                                                               |  | 37         
|                                                                                                              | 
|PART II OTHER INFORMATION                                                                                     |  |            
|                                                                                                              | 
|Item 1A.
Risk Factors                                                                                         |  | 38         
|                                                                                                              | 
|Item 4.
Submission of Matters to a Vote of Security Holders                                                   |  | 45         
|                                                                                                              | 
|Item 6.
Exhibits                                                                                              |  | 46         
|                                                                                                              | 
|SIGNATURES                                                                                                    |  | 47         



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##### Table of Contents

PART I. FINANCIAL INFORMATION



|Item 1. | Financial Statements
|------- | --------------------

Mentor Graphics Corporation

Condensed Consolidated Statements of Operations

(Unaudited)



|                                               |  |      |         |   |      |   |         |  
|---------------------------------------------- |  | ---- | ------- | - | ---- | - | ------- | -
|Three months ended June 30,                    |  | 2006 |         |   | 2005 |  
|In thousands, except per share data            |  |      |         |   |      |  
|Revenues:                                      |  |      |         |   |      |   |         |  
|System and software                            |  | $    | 101,226 |   |      | $ | 81,375  |  
|Service and support                            |  |      | 77,207  |   |      |   | 73,461  |  
|                                               |  |      |         |   |      |   |         |  
|Total revenues                                 |  |      | 178,433 |   |      |   | 154,836 |  
|                                               |  |      |         |   |      |   |         |  
|Cost of revenues:                              |  |      |         |   |      |   |         |  
|System and software                            |  |      | 3,559   |   |      |   | 4,828   |  
|Service and support                            |  |      | 20,800  |   |      |   | 20,339  |  
|Amortization of purchased technology           |  |      | 3,421   |   |      |   | 2,700   |  
|                                               |  |      |         |   |      |   |         |  
|Total cost of revenues                         |  |      | 27,780  |   |      |   | 27,867  |  
|                                               |  |      |         |   |      |   |         |  
|Gross margin                                   |  |      | 150,653 |   |      |   | 126,969 |  
|                                               |  |      |         |   |      |   |         |  
|Operating expenses:                            |  |      |         |   |      |   |         |  
|Research and development                       |  |      | 55,293  |   |      |   | 56,193  |  
|Marketing and selling                          |  |      | 69,334  |   |      |   | 65,324  |  
|General and administration                     |  |      | 22,876  |   |      |   | 18,752  |  
|Amortization of intangible assets              |  |      | 1,121   |   |      |   | 972     |  
|Special charges                                |  |      | 917     |   |      |   | 1,264   |  
|Merger and acquisition related charges         |  |      |        |   |      |   | 750     |  
|                                               |  |      |         |   |      |   |         |  
|Total operating expenses                       |  |      | 149,541 |   |      |   | 143,255 |  
|                                               |  |      |         |   |      |   |         |  
|Operating income (loss)                        |  |      | 1,112   |   |      |   | (16,286 | )
|Other income, net                              |  |      | 5,403   |   |      |   | 2,842   |  
|Interest expense                               |  |      | (6,758  | ) |      |   | (5,638  | )
|                                               |  |      |         |   |      |   |         |  
|Loss before income taxes                       |  |      | (243    | ) |      |   | (19,082 | )
|Provision for (benefit from) income taxes      |  |      | 205     |   |      |   | (12,239 | )
|                                               |  |      |         |   |      |   |         |  
|Net loss                                       |  | $    | (448    | ) |      | $ | (6,843  | )
|                                               |  |      |         |   |      |   |         |  
|Net loss per share:                            |  |      |         |   |      |   |         |  
|Basic                                          |  | $    | (0.01   | ) |      | $ | (0.09   | )
|                                               |  |      |         |   |      |   |         |  
|Diluted                                        |  | $    | (0.01   | ) |      | $ | (0.09   | )
|                                               |  |      |         |   |      |   |         |  
|Weighted average number of shares outstanding: |  |      |         |   |      |   |         |  
|Basic                                          |  |      | 80,348  |   |      |   | 78,165  |  
|                                               |  |      |         |   |      |   |         |  
|Diluted                                        |  |      | 80,348  |   |      |   | 78,165  |  
|                                               |  |      |         |   |      |   |         |  

See accompanying notes to unaudited consolidated financial statements.



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Mentor Graphics Corporation

Condensed Consolidated Statements of Operations

(Unaudited)



|                                               |  |      |         |   |      |   |         |  
|---------------------------------------------- |  | ---- | ------- | - | ---- | - | ------- | -
|Six months ended June 30,                      |  | 2006 |         |   | 2005 |  
|In thousands, except per share data            |  |      |         |   |      |  
|Revenues:                                      |  |      |         |   |      |   |         |  
|System and software                            |  | $    | 204,166 |   |      | $ | 172,935 |  
|Service and support                            |  |      | 150,589 |   |      |   | 146,235 |  
|                                               |  |      |         |   |      |   |         |  
|Total revenues                                 |  |      | 354,755 |   |      |   | 319,170 |  
|                                               |  |      |         |   |      |   |         |  
|Cost of revenues:                              |  |      |         |   |      |   |         |  
|System and software                            |  |      | 7,874   |   |      |   | 9,563   |  
|Service and support                            |  |      | 41,050  |   |      |   | 40,247  |  
|Amortization of purchased technology           |  |      | 6,656   |   |      |   | 5,413   |  
|                                               |  |      |         |   |      |   |         |  
|Total cost of revenues                         |  |      | 55,580  |   |      |   | 55,223  |  
|                                               |  |      |         |   |      |   |         |  
|Gross margin                                   |  |      | 299,175 |   |      |   | 263,947 |  
|                                               |  |      |         |   |      |   |         |  
|Operating expenses:                            |  |      |         |   |      |   |         |  
|Research and development                       |  |      | 110,356 |   |      |   | 107,503 |  
|Marketing and selling                          |  |      | 136,305 |   |      |   | 132,899 |  
|General and administration                     |  |      | 43,795  |   |      |   | 37,460  |  
|Amortization of intangible assets              |  |      | 2,247   |   |      |   | 2,094   |  
|Special charges                                |  |      | 6,153   |   |      |   | 2,577   |  
|Merger and acquisition related charges         |  |      | 180     |   |      |   | 750     |  
|                                               |  |      |         |   |      |   |         |  
|Total operating expenses                       |  |      | 299,036 |   |      |   | 283,283 |  
|                                               |  |      |         |   |      |   |         |  
|Operating income (loss)                        |  |      | 139     |   |      |   | (19,336 | )
|Other income, net                              |  |      | 9,035   |   |      |   | 6,457   |  
|Interest expense                               |  |      | (20,465 | ) |      |   | (10,669 | )
|                                               |  |      |         |   |      |   |         |  
|Loss before income taxes                       |  |      | (11,291 | ) |      |   | (23,548 | )
|Benefit from income taxes                      |  |      | (4,983  | ) |      |   | (12,319 | )
|                                               |  |      |         |   |      |   |         |  
|Net loss                                       |  | $    | (6,308  | ) |      | $ | (11,229 | )
|                                               |  |      |         |   |      |   |         |  
|Net loss per share:                            |  |      |         |   |      |   |         |  
|Basic                                          |  | $    | (0.08   | ) |      | $ | (0.14   | )
|                                               |  |      |         |   |      |   |         |  
|Diluted                                        |  | $    | (0.08   | ) |      | $ | (0.14   | )
|                                               |  |      |         |   |      |   |         |  
|Weighted average number of shares outstanding: |  |      |         |   |      |   |         |  
|Basic                                          |  |      | 80,229  |   |      |   | 78,086  |  
|                                               |  |      |         |   |      |   |         |  
|Diluted                                        |  |      | 80,229  |   |      |   | 78,086  |  
|                                               |  |      |         |   |      |   |         |  

See accompanying notes to unaudited consolidated financial statements.



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Mentor Graphics Corporation

Condensed Consolidated Balance Sheets

(Unaudited)



|                                                                                                              |  |                     |           |                         |   |          
|------------------------------------------------------------------------------------------------------------- |  | ------------------- | --------- | ----------------------- | - | ---------
|                                                                                                              |  | As of June 30, 2006 |           | As of December 31, 2005
|In thousands                                                                                                  |  |                     |           |                        
|Assets                                                                                                        |  |                     |           |                         |   |          
|Current assets:                                                                                               |  |                     |           |                         |   |          
|Cash and cash equivalents                                                                                     |  | $                   | 63,578    |                         | $ | 74,653   
|Short-term investments                                                                                        |  |                     | 72,754    |                         |   | 39,757   
|Trade accounts receivable, net of allowance for doubtful accounts of $4,375 and $4,487, respectively          |  |                     | 233,361   |                         |   | 234,866  
|Other receivables                                                                                             |  |                     | 8,371     |                         |   | 11,771   
|Inventory                                                                                                     |  |                     | 3,362     |                         |   | 2,395    
|Prepaid expenses and other                                                                                    |  |                     | 16,529    |                         |   | 15,562   
|Deferred income taxes                                                                                         |  |                     | 13,448    |                         |   | 13,127   
|                                                                                                              |  |                     |           |                         |   |          
|Total current assets                                                                                          |  |                     | 411,403   |                         |   | 392,131  
|Property, plant and equipment, net                                                                            |  |                     | 81,099    |                         |   | 81,374   
|Term receivables, long-term                                                                                   |  |                     | 120,912   |                         |   | 131,676  
|Goodwill                                                                                                      |  |                     | 350,351   |                         |   | 346,662  
|Intangible assets, net                                                                                        |  |                     | 27,731    |                         |   | 34,463   
|Deferred income taxes                                                                                         |  |                     | 19,908    |                         |   | 17,979   
|Other assets                                                                                                  |  |                     | 21,331    |                         |   | 16,652   
|                                                                                                              |  |                     |           |                         |   |          
|Total assets                                                                                                  |  | $                   | 1,032,735 |                         | $ | 1,020,937
|                                                                                                              |  |                     |           |                         |   |          
|Liabilities and Stockholders Equity                                                                          |  |                     |           |                         |   |          
|Current liabilities:                                                                                          |  |                     |           |                         |   |          
|Short-term borrowings                                                                                         |  | $                   | 9,651     |                         | $ | 11,858   
|Accounts payable                                                                                              |  |                     | 12,095    |                         |   | 15,268   
|Income taxes payable                                                                                          |  |                     | 32,083    |                         |   | 37,598   
|Accrued payroll and related liabilities                                                                       |  |                     | 72,040    |                         |   | 73,244   
|Accrued liabilities                                                                                           |  |                     | 31,469    |                         |   | 29,362   
|Deferred revenue                                                                                              |  |                     | 123,897   |                         |   | 106,453  
|                                                                                                              |  |                     |           |                         |   |          
|Total current liabilities                                                                                     |  |                     | 281,235   |                         |   | 273,783  
|Notes payable                                                                                                 |  |                     | 271,855   |                         |   | 282,188  
|Other long-term liabilities                                                                                   |  |                     | 15,857    |                         |   | 16,826   
|                                                                                                              |  |                     |           |                         |   |          
|Total liabilities                                                                                             |  |                     | 568,947   |                         |   | 572,797  
|                                                                                                              |  |                     |           |                         |   |          
|Commitments and contingencies (Note 13)                                                                       |  |                     |           |                         |   |          
|Stockholders equity:                                                                                         |  |                     |           |                         |   |          
|Common stock, no par value, 200,000 shares authorized; 80,437 and 79,248 issued and outstanding, respectively |  |                     | 397,874   |                         |   | 381,962  
|Retained earnings                                                                                             |  |                     | 39,216    |                         |   | 45,524   
|Accumulated other comprehensive income                                                                        |  |                     | 26,698    |                         |   | 20,654   
|                                                                                                              |  |                     |           |                         |   |          
|Total stockholders equity                                                                                    |  |                     | 463,788   |                         |   | 448,140  
|                                                                                                              |  |                     |           |                         |   |          
|Total liabilities and stockholders equity                                                                    |  | $                   | 1,032,735 |                         | $ | 1,020,937
|                                                                                                              |  |                     |           |                         |   |          

See accompanying notes to unaudited consolidated financial statements.



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Mentor Graphics Corporation

Condensed Consolidated Statements of Cash Flows

(Unaudited)



|                                                                                |  |      |          |   |      |   |         |  
|------------------------------------------------------------------------------- |  | ---- | -------- | - | ---- | - | ------- | -
|Six months ended June 30,                                                       |  | 2006 |          |   | 2005 |  
|In thousands                                                                    |  |      |          |   |      |  
|Operating Cash Flows:                                                           |  |      |          |   |      |   |         |  
|Net loss                                                                        |  | $    | (6,308   | ) |      | $ | (11,229 | )
|Adjustments to reconcile net loss to net cash provided by operating activities: |  |      |          |   |      |   |         |  
|Depreciation and amortization of property, plant and equipment                  |  |      | 12,670   |   |      |   | 12,016  |  
|Amortization of intangible assets                                               |  |      | 8,903    |   |      |   | 7,505   |  
|Amortization of note issuance costs                                             |  |      | 889      |   |      |   | 1,404   |  
|Amortization of deferred tax charge                                             |  |      |         |   |      |   | 1,160   |  
|Write-off of debt issuance costs                                                |  |      | 2,260    |   |      |   | 397     |  
|Gain on debt extinguishment                                                     |  |      | (1,071   | ) |      |   |        |  
|Stock based compensation                                                        |  |      | 6,555    |   |      |   |        |  
|Deferred income taxes                                                           |  |      | (2,282   | ) |      |   | 104     |  
|Changes in other long-term liabilities                                          |  |      | (1,328   | ) |      |   | (1,364  | )
|Merger and acquisition related charges                                          |  |      | 180      |   |      |   | 750     |  
|Loss (gain) on disposal of property, plant and equipment, net                   |  |      | 798      |   |      |   | (924    | )
|Changes in operating assets and liabilities:                                    |  |      |          |   |      |   |         |  
|Trade accounts receivable                                                       |  |      | 6,112    |   |      |   | 11,190  |  
|Prepaid expenses and other                                                      |  |      | 3,101    |   |      |   | (2,837  | )
|Term receivables, long-term                                                     |  |      | 13,104   |   |      |   | 17,456  |  
|Accounts payable and accrued liabilities                                        |  |      | (5,986   | ) |      |   | (24,338 | )
|Income taxes payable                                                            |  |      | (6,276   | ) |      |   | (15,882 | )
|Deferred revenue                                                                |  |      | 14,894   |   |      |   | 20,041  |  
|                                                                                |  |      |          |   |      |   |         |  
|Net cash provided by operating activities                                       |  |      | 46,215   |   |      |   | 15,449  |  
|                                                                                |  |      |          |   |      |   |         |  
|Investing Cash Flows:                                                           |  |      |          |   |      |   |         |  
|Proceeds from sales and maturities of short-term investments                    |  |      | 46,505   |   |      |   | 37,281  |  
|Purchases of short-term investments                                             |  |      | (79,502  | ) |      |   | (32,325 | )
|Purchases of property, plant and equipment                                      |  |      | (12,494  | ) |      |   | (12,610 | )
|Proceeds from sale of property, plant and equipment                             |  |      |         |   |      |   | 9,731   |  
|Purchases of intangible assets                                                  |  |      | (193     | ) |      |   |        |  
|Acquisitions of businesses and equity interests                                 |  |      | (4,820   | ) |      |   | (23,121 | )
|                                                                                |  |      |          |   |      |   |         |  
|Net cash used in investing activities                                           |  |      | (50,504  | ) |      |   | (21,044 | )
|                                                                                |  |      |          |   |      |   |         |  
|Financing Cash Flows:                                                           |  |      |          |   |      |   |         |  
|Proceeds from issuance of common stock                                          |  |      | 9,357    |   |      |   | 9,698   |  
|Net decrease in short-term borrowings                                           |  |      | (1,669   | ) |      |   | (1,842  | )
|Debt issuance costs                                                             |  |      | (5,750   | ) |      |   | (822    | )
|Proceeds from long-term notes payable                                           |  |      | 200,000  |   |      |   |        |  
|Repayment of long-term notes payable                                            |  |      | (209,263 | ) |      |   | (860    | )
|                                                                                |  |      |          |   |      |   |         |  
|Net cash provided by (used in) financing activities                             |  |      | (7,325   | ) |      |   | 6,174   |  
|                                                                                |  |      |          |   |      |   |         |  
|Effect of exchange rate changes on cash and cash equivalents                    |  |      | 539      |   |      |   | (2,691  | )
|                                                                                |  |      |          |   |      |   |         |  
|Net change in cash and cash equivalents                                         |  |      | (11,075  | ) |      |   | (2,112  | )
|Cash and cash equivalents at beginning of period                                |  |      | 74,653   |   |      |   | 67,916  |  
|                                                                                |  |      |          |   |      |   |         |  
|Cash and cash equivalents at end of period                                      |  | $    | 63,578   |   |      | $ | 65,804  |  
|                                                                                |  |      |          |   |      |   |         |  

See accompanying notes to unaudited consolidated financial statements.



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MENTOR GRAPHICS CORPORATION

Notes to Unaudited Condensed Consolidated Financial Statements

(In thousands, except per share amounts)



|(1) | General  The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting
principles and reflect all material normal recurring adjustments. However, certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles
have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. In the opinion of management, the condensed consolidated financial statements include adjustments necessary for a fair presentation of
the results of the interim periods presented. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Companys Annual Report on Form 10-K
for the fiscal year ended December 31, 2005.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The preparation of condensed consolidated financial statements in
conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the
consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.



|(2) | Summary of Significant Accounting Policies 
|--- | --------------------------------------------

Principles of Consolidation

The condensed consolidated financial statements include the financial statements of the Company
and its wholly owned and majority-owned subsidiaries. All intercompany accounts and transactions are eliminated in consolidation.

The
Company does not have off-balance sheet arrangements, financings or other relationships with unconsolidated entities or other persons, also known as special purpose entities. In the ordinary course of business, the Company leases certain real
properties, primarily field office facilities and equipment, as described in Note 13.

Revenue Recognition

The Company derives system and software revenue from the sale of licenses of software products and emulation hardware systems. The Company derives service
and support revenue from software and hardware maintenance services, multi-year term contracts (or term license installment agreements) and professional services, which include consulting services, training services and other services.

For the sale of licenses of software products and related service and support, the Company recognizes revenue in accordance with Statement of Position
(SOP) 97-2, Software Revenue Recognition, as amended by SOP 98-9, Modification of SOP 97-2, Software Revenue Recognition, With Respect to Certain Transactions. The Company recognizes revenue from perpetual license
arrangements upon shipment, provided persuasive evidence of an arrangement exists, fees are fixed or determinable and collection is probable. The Company recognizes product revenue from term license installment agreements upon shipment and start of
the license term, provided persuasive evidence of an arrangement exists, fees are fixed or determinable and collection is probable. The Company uses term license installment agreements as a standard business practice and has a history of
successfully collecting under the original payment terms without making concessions on payments, products or services. In a term license agreement in which the Company provides the customer with rights to unspecified or unreleased future products,
revenue is recognized ratably over the license term.

The Company uses the residual method to recognize revenue when a license agreement
includes one or more elements to be delivered at a future date if evidence of the fair value of all undelivered elements exists. If an undelivered element of the arrangement exists under the license arrangement, revenue is



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deferred based on vendor-specific objective evidence of the fair value of the undelivered element, as established by the price charged when such element is
sold separately. If vendor-specific objective evidence of fair value does not exist for all undelivered elements, the Company defers all revenue until sufficient evidence exists or all elements have been delivered.

The Company defers and recognizes revenue from annual maintenance and support arrangements ratably over the term of the contract. The Company recognizes
revenue from consulting and training when the services are performed.

For the sale of emulation hardware systems and related service and
support, the Company recognizes revenue in accordance with Securities and Exchange Commission (SEC) Staff Accounting Bulletin (SAB) No. 104, Revenue Recognition. The Company recognizes revenue when the title and risk of loss have
passed to the customer, there is persuasive evidence of an arrangement, delivery has occurred or services have been rendered, the sales price is fixed or determinable and collection is probable. When the terms of sale include customer acceptance
provisions and compliance with those provisions cannot be demonstrated until customer use, the Company recognizes revenue upon acceptance. The Company provides limited warranty on emulation hardware systems generally for a period of ninety days. The
Company maintains an accrued warranty reserve to provide for these potential future costs and evaluates its adequacy on a quarterly basis.

For subscription licenses, the Company allocates a portion of the revenue to maintenance revenue based on the estimated fair value of the maintenance. The estimated fair value of maintenance is based upon pricing when maintenance is sold
separately.

Reclassifications

Certain reclassifications have been made in the accompanying condensed consolidated financial statements for 2005 to conform to the 2006 presentation.



|(3) | Accounting for Stock-Based Compensation  On January 1, 2006, the Company adopted the provisions of Statement of Financial Accounting Standards (SFAS)
No. 123 (revised 2004), Share-Based Payment (SFAS 123(R)) which requires the measurement of stock-based compensation expense for all share-based payment awards made to employees for services. In March 2005, the SEC issued
SAB No. 107, which provided supplemental implementation guidance for SFAS 123(R). Prior to January 1, 2006, the Company accounted for its share-based compensation plans using the intrinsic value method under the recognition and
measurement provisions of Accounting Principles Board Opinion No. 25, Accounting for Stock Issued to Employees (APB 25) and related guidance. Under the intrinsic value method, the Company did not recognize any significant
amount of stock-based compensation expense in the Companys consolidated statements of operations, as options granted by the Company generally had an exercise price equal to the market value of the underlying common stock on the date of grant.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The Company has elected to adopt the modified prospective transition method permitted by SFAS 123(R) and accordingly prior
periods have not been restated to reflect the impact of SFAS 123(R). The modified prospective transition method requires that stock-based compensation expense be recorded for (a) any share-based awards granted through, but not yet vested
as of December 31, 2005 based on the grant-date fair value estimated in accordance with SFAS 123, and (b) any share-based awards granted subsequent to December 31, 2005, based on the grant-date fair value estimated in accordance with
the provisions of SFAS 123(R). The Company has recorded $3,614 and $6,555 of stock-based compensation expense for the three and six months ended June 30, 2006, respectively, as a result of the adoption of SFAS 123(R). In accordance
with SFAS 123(R), the Company will present excess tax benefits from the exercise of stock options as a financing activity in the consolidated statements of cash flows. The Company did not record any excess tax benefits for the three and six
months ended June 30, 2006.

The Company estimates the fair value of stock options under SFAS 123(R) using a Black-Scholes
option-pricing model consistent with that used for pro forma disclosures under SFAS 123, prior to the adoption of SFAS No. 123(R). The Black-Scholes option-pricing model incorporates several highly subjective assumptions including expected
volatility, expected term and interest rates. Elements the Company includes in reaching its determination of expected volatility are: (i) historical volatility of the Companys shares, (ii) historical volatility of shares of
comparable companies, (iii) implied volatility of the option features in the Companys Debentures, and (iv) implied volatility of traded options of comparable



8



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##### Table of Contents

companies. The expected term of the Companys stock options is based on historical experience. Using the Black-Scholes methodology, the weighted average
fair value of options granted was $7.75 and $4.23 per share during the three months ended June 30, 2006 and 2005, respectively, and $7.66 and $4.64 for the six months ended June 30, 2006 and 2005, respectively. The weighted average
estimated fair value of purchase rights under the Employee Stock Purchase Plans (ESPPs) was $5.46 and $2.44 during the three months ended June 30, 2006 and 2005, respectively, and $5.46 and $2.44 during the six months ended June 30, 2006
and 2005, respectively. The calculations used the following assumptions:



|                                      |  |                            |   |  |                          |   |  |      |   |  |      |  
|------------------------------------- |  | -------------------------- | - |  | ------------------------ | - |  | ---- | - |  | ---- | -
|                                      |  | Three months endedJune 30, |   |  | Six months endedJune 30, |  
|Stock Option Plans                    |  | 2006                       |   |  | 2005                     |   |  | 2006 |   |  | 2005 |  
|Risk-free interest rate               |  | 5.0                        | % |  | 3.9                      | % |  | 4.8  | % |  | 3.9  | %
|Dividend yield                        |  | 0                          | % |  | 0                        | % |  | 0    | % |  | 0    | %
|Expected life (in years)              |  | 4.5                        |   |  | 4.4                      |   |  | 4.5  |   |  | 4.4  |  
|Volatility                            |  | 55                         | % |  | 45                       | % |  | 55   | % |  | 45   | %
|                                      |  |                           
|                                      |  | Three months endedJune 30, |   |  | Six months endedJune 30, |  
|Employee Stock Purchase Plans (ESPPs) |  | 2006                       |   |  | 2005                     |   |  | 2006 |   |  | 2005 |  
|Risk-free interest rate               |  | 5.0                        | % |  | 3.3                      | % |  | 4.9  | % |  | 3.3  | %
|Dividend yield                        |  | 0                          | % |  | 0                        | % |  | 0    | % |  | 0    | %
|Expected life (in years)              |  | 1.25                       |   |  | 1.25                     |   |  | 1.25 |   |  | 1.25 |  
|Volatility                            |  | 45                         | % |  | 45                       | % |  | 45   | % |  | 45   | %

If the Company had accounted for its stock-based compensation plans in accordance with SFAS
No. 123 for the three and six months ended June 30, 2005, the Companys net loss and net loss per share would approximate the pro forma disclosures below:



|                                                                                                                                                                               |  |                                 |         |   |                               |   |         |  
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  | ------------------------------- | ------- | - | ----------------------------- | - | ------- | -
|                                                                                                                                                                               |  | Three months endedJune 30, 2005 |         |   | Six months endedJune 30, 2005 |  
|Net loss, as reported                                                                                                                                                          |  | $                               | (6,843  | ) |                               | $ | (11,229 | )
|Less: Total stock-based employee compensation expense determined under fair value based method, for all awards not previously included in net
loss, net of related tax benefit |  |                                 | (4,298  | ) |                               |   | (8,150  | )
|                                                                                                                                                                               |  |                                 |         |   |                               |   |         |  
|Pro forma net loss                                                                                                                                                             |  | $                               | (11,141 | ) |                               | $ | (19,379 | )
|                                                                                                                                                                               |  |                                 |         |   |                               |   |         |  
|Basic net loss per share  as reported                                                                                                                                         |  | $                               | (.09    | ) |                               | $ | (.14    | )
|Basic net loss per share  pro forma                                                                                                                                           |  | $                               | (.14    | ) |                               | $ | (.25    | )
|Diluted net loss per share  as reported                                                                                                                                       |  | $                               | (.09    | ) |                               | $ | (.14    | )
|Diluted net loss per share  pro forma                                                                                                                                         |  | $                               | (.14    | ) |                               | $ | (.25    | )

The Company has $16,276 of unrecognized stock-based compensation expense as of June 30, 2006
related to unvested stock option awards. This expense is expected to be recognized over a weighted-average period of approximately 3.0 years. The total intrinsic value of options exercised in the first six months of 2006 and 2005 were $2,468 and
$1,890, respectively.



9



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##### Table of Contents

The stock-based compensation expense that is included in our results of operations for the three and six
months ended June 30, 2006 is as follows:



|                                         |  |                                  |        |   |                               |   |        |  
|---------------------------------------- |  | -------------------------------- | ------ | - | ----------------------------- | - | ------ | -
|                                         |  | Three months ended June 30, 2006 |        |   | Six months endedJune 30, 2006 |  
|Cost of Revenues:                        |  |                                  |        |   |                               |   |        |  
|Service and support                      |  | $                                | (261   | ) |                               | $ | (453   | )
|Operating Expense:                       |  |                                  |        |   |                               |   |        |  
|Research and development                 |  |                                  | (1,567 | ) |                               |   | (2,866 | )
|Marketing and selling                    |  |                                  | (1,296 | ) |                               |   | (2,306 | )
|General and administration               |  |                                  | (490   | ) |                               |   | (930   | )
|                                         |  |                                  |        |   |                               |   |        |  
|Equity plan-related compensation expense |  | $                                | (3,614 | ) |                               | $ | (6,555 | )
|                                         |  |                                  |        |   |                               |   |        |  
|Effect on net loss per share:            |  |                                  |        |   |                               |   |        |  
|Basic                                    |  | $                                | (0.04  | ) |                               | $ | (0.08  | )
|                                         |  |                                  |        |   |                               |   |        |  
|Diluted                                  |  | $                                | (0.04  | ) |                               | $ | (0.08  | )
|                                         |  |                                  |        |   |                               |   |        |  

Employee Stock and Savings Plans

The Company has three common stock option plans which provide for the granting of incentive and nonqualified stock options to key employees, officers and
non-employee directors of the Company and its subsidiaries. The three stock option plans are administered by the Compensation Committee of the Board of Directors and permit accelerated vesting of outstanding options upon the occurrence of certain
changes in control of the Company.

The Company also has a stock plan that provides for the sale of common stock to key employees of the
Company and its subsidiaries. Shares can be awarded under the plan at no purchase price as a stock bonus and the stock plan also provides for the granting of nonqualified stock options.

The Company has an ESPP for U.S. employees and an ESPP for certain foreign subsidiary employees. The ESPPs provide for overlapping two-year offerings
starting every six months on January 1 and July 1 of each year with purchases every six months during those offerings. Each eligible employee may purchase up to sixteen hundred shares of stock on each purchase date at prices no less than
85% of the lesser of the fair market value of the shares at the beginning of the two-year offering period or on the applicable purchase date. At June 30, 2006 5,864 shares remain available for future purchase under the ESPPs.



10



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##### Table of Contents

The following table summarizes information about options outstanding and exercisable at June 30,
2006:



|                         |                 |             |                                         |             |                        |        |                 |      |                        |   |       |  |        |  |   |      
|------------------------ | --------------- | ----------- | --------------------------------------- | ----------- | ---------------------- | ------ | --------------- | ---- | ---------------------- | - | ----- |  | ------ |  | - | -----
|Range of Exercise Prices |                 | Outstanding |                                         | Exercisable
|                         | Numberof Shares |             | WeightedAverage ContractualLife (Years) |             | Weighted Average Price |        | Numberof Shares |      | Weighted Average Price
|$                        | 0.04            |             | $                                       | 0.04        |                        | 2      |                 | 0.38 |                        | $ | 0.04  |  | 2      |  | $ | 0.04 
|$                        | 0.13            |             | $                                       | 5.66        |                        | 2,120  |                 | 6.07 |                        | $ | 5.47  |  | 1,973  |  | $ | 5.46 
|$                        | 5.67            |             | $                                       | 8.41        |                        | 3,352  |                 | 6.36 |                        | $ | 8.12  |  | 1,412  |  | $ | 7.72 
|$                        | 8.50            |             | $                                       | 10.97       |                        | 2,135  |                 | 3.24 |                        | $ | 9.67  |  | 1,764  |  | $ | 9.67 
|$                        | 11.00           |             | $                                       | 12.56       |                        | 2,602  |                 | 6.69 |                        | $ | 11.95 |  | 1,470  |  | $ | 12.16
|$                        | 12.57           |             | $                                       | 14.63       |                        | 674    |                 | 5.73 |                        | $ | 13.31 |  | 489    |  | $ | 13.33
|$                        | 14.64           |             | $                                       | 15.25       |                        | 2,298  |                 | 7.28 |                        | $ | 15.22 |  | 2,171  |  | $ | 15.23
|$                        | 15.29           |             | $                                       | 17.81       |                        | 905    |                 | 5.68 |                        | $ | 16.69 |  | 851    |  | $ | 16.70
|$                        | 17.81           |             | $                                       | 17.81       |                        | 2,219  |                 | 4.29 |                        | $ | 17.81 |  | 2,219  |  | $ | 17.81
|$                        | 17.82           |             | $                                       | 38.15       |                        | 3,310  |                 | 5.26 |                        | $ | 20.18 |  | 3,304  |  | $ | 20.17
|                         |                 |             |                                         |             |                        |        |                 |      |                        |   |       |  |        |  |   |      
|$                        | 0.04            |             | $                                       | 38.15       |                        | 19,617 |                 | 5.67 |                        | $ | 13.05 |  | 15,655 |  | $ | 13.83
|                         |                 |             |                                         |             |                        |        |                 |      |                        |   |       |  |        |  |   |      

Options exercisable at June 30, 2006 have a weighted term of 4.88 years and an intrinsic value
of $29,376.

Options under all four plans generally expire ten years from the date of grant and become exercisable over four years from the
date of grant or from the commencement of employment at prices generally not less than the fair market value at the date of grant. At June 30, 2006, 5,714 shares were available for future grant.

On December 16, 2005, the Company accelerated the vesting of all outstanding non-director stock options with an exercise price equal to or greater
than $15.00, which were awarded to employees and officers under the Companys various stock option plans. The acceleration of the vesting of these options did not result in a charge based on generally accepted accounting principles under APB
25. The Company took this action to reduce future costs under SFAS 123(R).

Stock options outstanding, the weighted average exercise price
and transactions involving the stock option plans are summarized as follows:



|                             |  |        |   |  |       |      
|---------------------------- |  | ------ | - |  | ----- | -----
|                             |  | Shares |   |  | Price
|Balance at December 31, 2005 |  | 20,448 |   |  | $     | 12.98
|Granted                      |  | 252    |   |  |       | 12.17
|Exercised                    |  | (465   | ) |  |       | 6.73 
|Forfeited                    |  | (136   | ) |  |       | 9.57 
|Expired                      |  | (482   | ) |  |       | 16.84
|                             |  |        |   |  |       |      
|Balance at June 30, 2006     |  | 19,617 |   |  | $     | 13.05
|                             |  |        |   |  |       |      



|(4) | Net Loss Per Share  Basic net loss per share is computed using the weighted average number of common shares outstanding during the period. Diluted net loss per
share is computed using the weighted average number of common shares and dilutive potential common shares outstanding during the period. Potentially, dilutive common shares consist of common shares issuable upon exercise of employee stock options,
purchase rights from Employee Stock Purchase Plans and warrants using the treasury stock method and common shares issuable upon conversion of the convertible subordinated notes and convertible subordinated debentures, if dilutive.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



11



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The following provides the computation of basic and diluted net loss per share:



|                                                                                                 |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |         |  
|------------------------------------------------------------------------------------------------ |  | -------------------------- | ------ | - | ------------------------ | - | ------ | ---- |  | - | ------ | - |  | - | ------- | -
|                                                                                                 |  | Three months endedJune 30, |        |   | Six months endedJune 30, |  
|                                                                                                 |  | 2006                       |        |   | 2005                     |   |        | 2006 |  |   | 2005   |  
|Net loss                                                                                         |  | $                          | (448   | ) |                          | $ | (6,843 | )    |  | $ | (6,308 | ) |  | $ | (11,229 | )
|                                                                                                 |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |         |  
|Weighted average shares used to calculate basic net loss per share                               |  |                            | 80,348 |   |                          |   | 78,165 |      |  |   | 80,229 |   |  |   | 78,086  |  
|Employee stock options and employee stock purchase plan                                          |  |                            |       |   |                          |   |       |      |  |   |       |   |  |   |        |  
|                                                                                                 |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |         |  
|Weighted average common and potential common shares used to calculate diluted net loss per share |  |                            | 80,348 |   |                          |   | 78,165 |      |  |   | 80,229 |   |  |   | 78,086  |  
|                                                                                                 |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |         |  
|Basic net loss per share                                                                         |  | $                          | (.01   | ) |                          | $ | (.09   | )    |  | $ | (.08   | ) |  | $ | (.14    | )
|                                                                                                 |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |         |  
|Diluted net loss per share                                                                       |  | $                          | (.01   | ) |                          | $ | (.09   | )    |  | $ | (.08   | ) |  | $ | (.14    | )
|                                                                                                 |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |         |  

Options and warrants to purchase 19,802 and 19,165 shares of common stock for the three months
ended June 30, 2006 and 2005, respectively, and 20,041 and 19,333 for the six months ended June 30, 2006 and 2005, respectively, were not included in the computation of diluted earnings per share. The options and warrants were
anti-dilutive either because the Company incurred a net loss or because the exercise price was greater than the average market price of the common shares for the respective periods. The effect of the conversion of the Companys 6 7/8%
convertible subordinated notes (Notes), the floating rate convertible subordinated debentures (Floating Rate Debentures), and the newly issued 6.25% convertible subordinated dentures (6.25% Debentures) for the three and six months ended
June 30, 2006 and 2005 was anti-dilutive and therefore not included in the computation of diluted earnings per share. If the Notes had been dilutive, the Companys net loss per share would have included additional earnings, primarily from
the reduction of interest expense, of $0 and $2,681 for the three months ended June 30, 2006 and 2005, respectively, and $1,693 and $5,363 for the six months ended June 30, 2006 and 2005, respectively. The calculation would also have
included additional incremental shares of 0 and 7,369 for the three months ended June 30, 2006 and 2005, respectively, and 3,050 and 7,369 for the six months ended June 30, 2006 and 2005, respectively. If the Floating Rate Debentures had
been dilutive, additional earnings of $872 and $1,181 for the three months ended June 30, 2006 and 2005, respectively, and $1,951 and $2,264 for the six months ended June 30, 2006 and 2005, respectively, and incremental shares of 3,264 and
4,700 for the three months ended June 30, 2006 and 2005, respectively, and 3,877 and 4,700 for the six months ended June 30, 2006 and 2005, respectively, would have been included in the calculation of net loss per share. In accordance with
SFAS 128, Earnings per Share, the Company presumes that the 6.25% Debentures will be settled in common stock for purposes of calculating the dilutive effect of the 6.25% Debentures. If the 6.25% Debentures had been dilutive, additional
earnings of $2,081 and incremental shares of 173 would have been included in the calculation of net loss per share for the three months ended June 30, 2006, and additional earnings of $2,724 and incremental shares of 229 would have been
included in the calculation of net loss per share for the six months ended June 30, 2006. The conversion features of the 6.25% Debentures, which allow for settlement in cash, common stock, or a combination of cash and common stock, are further
described in Note 6, Long-Term Notes Payable.



|(5) | Short-Term Borrowings In June 2005, the Company entered into a syndicated, senior, unsecured revolving credit facility that replaced an
existing three-year revolving credit facility. Borrowings under the facility are permitted to a maximum of $120,000. The facility is a four-year revolving credit facility, which terminates on June 1, 2009. Under this facility, the Company has
the option to pay interest based on LIBOR with varying maturities which are commensurate with the borrowing period selected by the Company, plus a spread of between 1.0% and 1.6% or prime plus a spread of between 0.0% and 0.6%, based on a pricing
grid tied to a financial covenant. As a result, the Companys interest expense associated with borrowings under this credit facility will vary with market interest rates. In addition, commitment fees are payable on the unused portion of the
credit facility at rates between 0.25% and 0.35% based on a pricing grid tied to a financial covenant. The facility contains certain financial and other covenants, including
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



12



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##### Table of Contents

| | financial covenants requiring the maintenance of specified liquidity ratios, leverage ratios and minimum tangible net worth. The Company had no borrowings
during 2006 and 2005 against this credit facility or against the previous credit facility and had no balance outstanding at June 30, 2006 or December 31, 2005.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Other short-term borrowings at June 30, 2006 includes $584 of net proceeds received in connection with the sale of the future revenue streams of
certain long-term customer support contracts to certain financial institutions in the fourth quarter of 2005. As the Company has significant continuing involvement in the generation of cash flows due to the financial institutions, these future
revenue streams have been classified as short-term borrowings in accordance with Emerging Issues Task Force (EITF) 88-18, Sales of Future Revenues. These future revenue streams will be recognized as revenue over the remaining life of the
contracts and will have no future cash-flow impact. In addition, other short term borrowings at June 30, 2006 included $2,667 in amounts collected from customers on receivables previously sold on a non-recourse basis to financial institutions
which will be remitted to the financial institutions during the third quarter of 2006.

In addition, other short-term borrowings include
borrowings on multi-currency lines of credit, capital leases and other borrowings. Interest rates are generally based on the applicable countrys prime lending rate, depending on the currency borrowed. Other short-term borrowings of $6,401 and
$6,151 were outstanding under these facilities at June 30, 2006 and December 31, 2005, respectively.



|(6) | Long-Term Notes Payable  Long-Term Notes Payable consisted of the following:
|--- | -----------------------------------------------------------------------------



|                                  |  |                     |         |                         |   |        
|--------------------------------- |  | ------------------- | ------- | ----------------------- | - | -------
|                                  |  | As of June 30, 2006 |         | As of December 31, 2005
|6.25% Debentures due 2026         |  | $                   | 200,000 |                         | $ |       
|Floating Rate Debentures due 2023 |  |                     | 71,850  |                         |   | 110,000
|6 7/8% Notes due 2007             |  |                     |        |                         |   | 171,500
|Other                             |  |                     | 5       |                         |   | 688    
|                                  |  |                     |         |                         |   |        
|Total Long-Term Notes Payable     |  | $                   | 271,855 |                         | $ | 282,188
|                                  |  |                     |         |                         |   |        

6.25% Debentures due 2026: In March 2006, the Company issued $200,000 of 6.25% Convertible
Subordinated Debentures due 2026 (6.25% Debentures) in a private offering pursuant to Securities Act Rule 144A. Also in March 2006, the Company used the net proceeds of $194,250 from the sale of the 6.25% Debentures plus $14,317 from its cash
balances to retire the 6 7/8% Convertible Subordinated Notes due 2007 and to retire a portion of the Floating Rate Convertible Subordinated Debentures due 2023. The 6.25% Debentures have been registered with the SEC for resale under the Securities
Act of 1933. Interest on the 6.25% Debentures is payable semi-annually in March and September. The 6.25% Debentures are convertible, under certain circumstances, into the Companys common stock at a conversion price of $17.968 per share for a
total of 11,131 shares. These circumstances generally include (a) the market price of the Companys common stock exceeding 120% of the conversion price, (b) the market price of the 6.25% Debentures declining to less than 98% of the
value of the common stock into which the 6.25% Debentures are convertible, (c) a call for the redemption of the 6.25% Debentures, (d) specified distributions to holders of the Companys common stock, (e) if a fundamental change,
such as a change of control, occurs or (f) during the ten trading days prior to, but not on, the maturity date. Upon conversion, in lieu of shares of the Companys common stock, for each $1,000 principal amount of 6.25% Debentures a holder
will receive an amount of cash equal to the lesser of (i) $1,000 or (ii) the conversion value of the number of shares of the Companys common stock equal to the conversion rate. If such conversion value exceeds $1,000, the Company
will also deliver, at the Companys election, cash or common stock or a combination of cash and common stock with a value equal to the excess. If a holder elects to convert its 6.25% Debentures in connection with a fundamental change of the
Company that occurs prior to March 6, 2011, the holder will also be entitled to receive a make whole premium upon conversion in some circumstances. The 6.25% Debentures rank pari passu with the Floating Rate Debentures. Some or all of the 6.25%
Debentures may be redeemed by the Company for cash on or after March 6, 2011. Some or all of the 6.25% Debentures may be redeemed at the option of the holder for cash on March 1, 2013, 2016 or 2021.

Floating Rate Debentures due 2023: In August 2003, the Company issued $110,000 of Floating Rate Convertible Subordinated Debentures due 2023
(Floating Rate Debentures) in a private offering pursuant to



13



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##### Table of Contents

SEC Rule 144A. The Floating Rate Debentures have been registered with the SEC for resale under the Securities Act of 1933. Interest on the Floating Rate
Debentures is payable quarterly in February, May, August and November, at a variable interest rate equal to 3-month LIBOR plus 1.65%. The effective interest rate was 6.37% and 4.44% for the six months ended June 30, 2006 and 2005, respectively.
The Floating Rate Debentures are convertible, under certain circumstances, into the Companys common stock at a conversion price of $23.40 per share, for a total of 3,071 shares as of June 30, 2006. These circumstances generally include
(i) the market price of the Companys common stock exceeding 120% of the conversion price, (ii) the market price of the Floating Rate Debentures declining to less than 98% of the value of the common stock into which the Floating Rate
Debentures are convertible or (iii) a call for redemption of the Floating Rate Debentures or certain other corporate transactions. The conversion price may be adjusted based on certain future transactions, such as stock splits or stock
dividends. Some or all of the Floating Rate Debentures may be redeemed by the Company for cash on or after August 6, 2007. Some or all of the Floating Rate Debentures may be redeemed at the option of the holder for cash on August 6, 2010,
2013 or 2018. During the first six months of 2006, the Company purchased on the open market and retired Floating Rate Debentures with a principal balance of $38,150 for a total purchase price of $37,079. As a result, a principal amount of $71,850
remains outstanding. In connection with these purchases, the Company incurred a before tax net gain on the early extinguishment of debt of $177 included in interest expense, which included a $1,071 discount on the repurchased Floating Rate
Debentures partially offset by the write-off of $894 of a portion of unamortized deferred debt issuance costs.

6 7/8% Notes due
2007: In March 2006, the Company used a portion of the proceeds from the issuance of the 6.25% Debentures to retire the outstanding balance of $171,500 of the 6 7/8% Convertible Subordinated Notes (Notes) due 2007. In connection with this
retirement, the Company incurred before tax expenses for the early extinguishment of debt of $6,082. Expenses included $4,716 for the call premium on the Notes and $1,366 for the write-off of unamortized deferred debt issuance costs.

Other long-term notes payable include multi-currency notes payable and capital leases. Interest rates are generally based on the applicable countrys
prime lending rate, depending on the currency borrowed. Other long-term notes payable of $5 and $688 were outstanding under these agreements at June 30, 2006 and December 31, 2005, respectively.



|(7) | Supplemental Cash Flow Information The following provides additional information concerning supplemental disclosures of cash flow activities:
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------



|                          |  |      |        |      |   |      
|------------------------- |  | ---- | ------ | ---- | - | -----
|Six Months ended June 30, |  | 2006 |        | 2005
|Cash paid for:            |  |      |        |      |   |      
|Interest (1)              |  | $    | 13,917 |      | $ | 9,064
|Income taxes              |  | $    | 4,051  |      | $ | 2,172



| | (1) | Cash paid for interest for the six months ended June 30, 2006, included (i) $4,716 for the call premium on the Notes and (ii) $3,286 in interest accrued to the dates
of retirement of the Notes and Floating Rate Debentures. Refer to Note 6, Long-Term Notes Payable for more information regarding the retirements of the Notes and the Floating Rate Debentures.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The Company has entered into agreements to sell qualifying accounts receivable from time to time to certain financing institutions on a non-recourse
basis. During the six months ended June 30, 2006, the Company sold trade and term receivables in the amounts of $13,929 and $18,715, respectively, for net proceeds of $30,008. During the six months ended June 30, 2005, the Company sold
$14,032 of trade receivables for net proceeds of $13,955.



|(8) | Comprehensive Loss The following provides a summary of comprehensive loss:
|--- | ---------------------------------------------------------------------------



|                                                           |  |      |        |   |      |   |         |  
|---------------------------------------------------------- |  | ---- | ------ | - | ---- | - | ------- | -
|Six months ended June 30,                                  |  | 2006 |        |   | 2005 |  
|Net loss                                                   |  | $    | (6,308 | ) |      | $ | (11,229 | )
|Change in unrealized gain (loss) on derivative instruments |  |      | 1,535  |   |      |   | (1,284  | )
|Change in accumulated translation adjustment               |  |      | 4,509  |   |      |   | (7,747  | )
|                                                           |  |      |        |   |      |   |         |  
|Comprehensive loss                                         |  | $    | (264   | ) |      | $ | (20,260 | )
|                                                           |  |      |        |   |      |   |         |  



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##### Table of Contents

|(9) | Special Charges For the six months ended June 30, 2006, the Company recorded special charges of $6,153. These charges primarily consisted of costs incurred
for employee terminations and are due to the Companys reduction of personnel resources driven by modifications of business strategy or business emphasis and by the assimilation of acquired businesses.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The Company rebalanced its workforce by 73 employees during the six months ended June 30, 2006. The reduction impacted several employee groups.
Employee severance costs of $3,944 included severance benefits, notice pay and outplacement services. The total rebalance charge represents the aggregate of numerous unrelated rebalance plans, none of which was individually material to the
Companys financial position or results of operations. Termination benefits were communicated to the affected employees prior to the end of the quarter in which the charge was recorded. Approximately one-third of these costs were paid during
the first half of 2006. The Company expects the remainder of these costs to be paid during the second half of 2006. There have been no significant modifications to the amount of these charges.

In addition, special charges for the six months ended June 30, 2006 included costs of $1,625 incurred as a result of residual actions related to the
discontinuation of one of the Companys intellectual property product lines in the fourth quarter of 2005. These costs included $909 in non-cancelable lease payments, net of sublease income, related to the abandonment of excess leased facility
space in Europe. Non-cancelable lease payments on this excess leased facility space will be paid over eleven years. Other costs incurred in relation to the product-line discontinuation included a loss of $640 on the abandonment or disposal of
property and equipment primarily related to leasehold improvements and $76 for other costs.

The Company rebalanced its workforce by 54
employees during the six months ended June 30, 2005. The reduction impacted several employee groups. Employee severance costs of $2,348 included severance benefits, notice pay and outplacement services. The total rebalance charge represented
the aggregate of numerous unrelated rebalance plans, none of which was individually material to the Companys financial position or results of operations. Termination benefits were communicated to the affected employees prior to the end of the
quarter in which the charge was recorded. The majority of these costs were paid during the first nine months of 2005. There have been no significant modifications to the amount of these charges.

Other costs in the first six months of 2005 of $229 primarily included legal costs incurred to sever any ongoing obligation related to a defined benefit
pension plan acquired in connection with an acquisition in 1999 and excess leased facility costs.

Accrued special charges are included in
accrued liabilities and other long-term liabilities on the consolidated balance sheets. The following table shows changes in accrued special charges during the first six months of 2006:



|                                                |  |                                          |        |             |   |               |  |   |                                             |   |  |   |      
|----------------------------------------------- |  | ---------------------------------------- | ------ | ----------- | - | ------------- |  | - | ------------------------------------------- | - |  | - | -----
|                                                |  | AccruedSpecialCharges atDecember 31,2005 |        | 2006Charges |   | 2006 Payments |  |   | Accrued Special Charges at June 30, 2006(1)
|Employee severance and related costs            |  | $                                        | 2,581  |             | $ | 3,944         |  | $ | (5,185                                      | ) |  | $ | 1,340
|Lease termination fees and other facility costs |  |                                          | 7,650  |             |   | 1,448         |  |   | (2,242                                      | ) |  |   | 6,856
|Other costs                                     |  |                                          | 1,393  |             |   | 761           |  |   | (2,039                                      | ) |  |   | 115  
|                                                |  |                                          |        |             |   |               |  |   |                                             |   |  |   |      
|Total                                           |  | $                                        | 11,624 |             | $ | 6,153         |  | $ | (9,466                                      | ) |  | $ | 8,311
|                                                |  |                                          |        |             |   |               |  |   |                                             |   |  |   |      



| | (1) | Of the $8,311 total accrued special charges at June 30, 2006, $5,080 represented the long-term portion of accrued lease termination fees and other facility costs, net of
sublease income. The remaining balance of $3,231 represented the short-term portion of accrued special charges.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|(10) | Merger and Acquisition Related Charges  In January 2006, the Company acquired 100% of the shares of EverCAD Corporation, a privately held electronic design
automation (EDA) company based in Taiwan that specializes in advanced circuit simulation and analysis tools. The Company is integrating the acquired technology into its analog mixed signal verification product family. The total purchase price
including acquisition costs was $5,288. The excess of tangible assets acquired over liabilities assumed was $1,879. The cost of the acquisition was allocated on the basis of the estimated fair value of assets acquired and liabilities assumed. The
purchase accounting allocations resulted in a charge for in-process research and development of $180, goodwill of $2,112, technology of $1,100, and other identified intangible assets of $390, net of related deferred tax liability of $373. The
technology and the other identified intangible assets is being amortized to cost of revenues and operating expenses, respectively over three years.
|---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In June 2005, the Company purchased certain assets and assumed certain liabilities from Aptix Corporation (Aptix), a provider of reconfigurable prototyping products. Aptix was in Chapter 11 bankruptcy at the time the
purchase agreement was negotiated and closed. The purchase was an investment in a niche market that complemented the more expensive emulation systems sold by the Company. The total purchase price including acquisition costs was $1,835. In addition,
the Company recorded costs of vacating a leased facility of Aptix of $58. The excess of tangible assets acquired over liabilities assumed was $92. The cost of the acquisition was allocated on the basis of the estimated fair value of assets acquired
and liabilities assumed. The purchase accounting allocations resulted in a charge for in-process R&D of $170, goodwill of $251, technology of $780 and other identified intangible assets of $600. The technology is being amortized to cost of
revenues over two years and other identified intangible assets are being amortized to operating expenses over three years. The results of operations are included in the Companys consolidated financial statements from the date of acquisition
forward.

In May 2005, the Company acquired Volcano Communications Technologies AB (Volcano), a provider of network design tools, in vehicle
software and test and validation products for the automotive industry. The acquisition was an investment aimed at expanding the Companys product offering within this specialized industry and driving revenue growth. The total purchase price
including acquisition costs was $23,155. In addition, the Company recorded severance costs related to Volcano employees of $84, the majority of which was paid during the second half of 2005. Severance costs affected five employees who were
terminated due to the overlap of employee skill sets as a result of the acquisition. The excess of tangible assets acquired over liabilities assumed was $4,985. The cost of the acquisition was allocated on the basis of the estimated fair value of
assets acquired and liabilities assumed. The purchase accounting allocations resulted in a charge for in-process R&D of $580, goodwill of $10,942, technology of $2,450, and other identified intangible assets of $4,800, partially offset by a
related net deferred tax liability of $518. The technology is being amortized to cost of revenues over four years and other identified intangible assets is being amortized to operating expenses over five years. Of the $4,800 of other identified
intangible assets, $3,700 is being amortized to operating expenses over five years and $1,100 is being amortized to operating expenses over two years. The results of operations are included in the Companys consolidated financial statements
from the date of acquisition forward.

The separate results of operations for the acquisitions during the six months ended June 30,
2006 and 2005 were not material compared to the Companys overall results of operations and accordingly pro forma financial statements of the combined entities have been omitted. The results of operations are included in the Companys
consolidated financial statements from the date of acquisition forward.



|(11) | Gain on Sale of Asset  In March 2005, the Company sold a building located in Wilsonville, Oregon that had previously been leased to a third party for net
proceeds of $9,731, recognizing a gain on the sale of $957 during the six months ended June 30, 2005.
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(12) | Derivative Instruments and Hedging Activities  The Company is exposed to fluctuations in foreign currency exchange rates. To manage the
volatility, exposures are aggregated on a consolidated basis to take advantage of natural offsets. The primary exposures that do not currently have natural offsets are the Japanese yen where the Company is in a long position and the Euro and the
British pound sterling where the Company is in a short position. More than half of the Companys revenues and approximately one-third of
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | its expenses were generated outside of the United States for the first six months of 2006. For 2006 and 2005, approximately one-fourth of European and all
Japanese revenues were subject to exchange rate fluctuations as they were booked in local currencies. Most large European revenue contracts are denominated and paid to the Company in the United States dollar while the Companys European
expenses, including substantial research and development operations, are paid in local currencies causing a short position in the Euro and the British pound sterling. In addition, the Company experiences greater inflows than outflows of Japanese yen
as all Japanese-based customers contract and pay the Company in local currency. While these exposures are aggregated on a consolidated basis to take advantage of natural offsets, substantial exposure remains.
| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

For exposures that are not offset, the Company enters into short-term foreign currency forward and option contracts to partially offset these anticipated
exposures. The Company formally documents all relationships between foreign currency contracts and hedged items as well as its risk management objectives and strategies for undertaking various hedge transactions. All hedges designated as cash flow
hedges are linked to forecasted transactions, and the Company assesses, both at inception of the hedge and on an ongoing basis, the effectiveness of the foreign exchange contracts in offsetting changes in the cash flows of the hedged items. The
effective portions of the net gains or losses on foreign currency contracts are reported as a component of accumulated other comprehensive income in stockholders equity. Accumulated other comprehensive income associated with hedges of
forecasted transactions is reclassified to the consolidated statement of operations in the same period as the forecasted transaction occurs. The Company discontinues hedge accounting prospectively when it is determined that a foreign currency
contract is not highly effective as a hedge under the requirements of SFAS No. 133, Accounting for Derivative Instruments and Hedging Activities (SFAS No. 133). To the extent a forecasted transaction is no longer deemed probable of
occurring, hedge accounting treatment is discontinued prospectively and amounts deferred are reclassified to other income, net.

The fair
value of foreign currency forward and option contracts, recorded in prepaid expenses and other in the consolidated balance sheet, was $2,567 and $2,542 at June 30, 2006 and December 31, 2005, respectively.

The following provides a summary of activity in accumulated other comprehensive income relating to the Companys hedging program:



|                                             |  |      |       |   |      |   |        |  
|-------------------------------------------- |  | ---- | ----- | - | ---- | - | ------ | -
|Six months ended June 30,                    |  | 2006 |       |   | 2005 |  
|Beginning balance                            |  | $    |      |   |      | $ | 1,144  |  
|Changes in fair value of cash flow hedges    |  |      | 2,154 |   |      |   | (1,493 | )
|Hedge ineffectiveness recognized in earnings |  |      | 6     |   |      |   |       |  
|Net (gain) loss transferred to earnings      |  |      | (625  | ) |      |   | 209    |  
|                                             |  |      |       |   |      |   |        |  
|Net unrealized gain (loss)                   |  | $    | 1,535 |   |      | $ | (140   | )
|                                             |  |      |       |   |      |   |        |  

The remaining balance in accumulated other comprehensive income at June 30, 2006 represents a
net unrealized gain on foreign currency contracts relating to hedges of forecasted revenues and expenses expected to occur during 2006 and 2007. These amounts will be transferred to the consolidated statement of operations upon recognition of the
related revenue and recording of the respective expenses. The Company expects substantially all of the balance in accumulated other comprehensive income to be reclassified to the consolidated statement of operations within the next twelve months.
The Company transferred a deferred loss of $424 and $1,178 to system and software revenues relating to foreign currency contracts hedging revenues for the six months ended June 30, 2006 and 2005, respectively. The Company transferred a deferred
gain of $1,049 and $969 to operating expenses relating to foreign currency contracts hedging commission and other expenses for the six months ended June 30, 2006 and 2005, respectively.

The Company enters into foreign currency contracts to offset the earnings impact relating to the variability in exchange rates on certain short-term
monetary assets and liabilities denominated in non-functional currencies. These foreign exchange contracts are not designated as hedges. Changes in the fair value of



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these contracts are recognized currently in earnings in other income, net to offset the remeasurement of the related assets and liabilities.

In accordance with SFAS No. 133, the Company excludes changes in fair value relating to time value of foreign currency forward contracts from its
assessment of hedge effectiveness. The Company recorded income relating to time value in other income, net, of $852 and $571 for the three months ended June 30, 2006 and 2005, respectively, and $1,428 and $986 for the six months ended
June 30, 2006 and 2005, respectively. The Company recorded expense related to time value in interest expense of $438 and $362 for the three months ended June 30, 2006 and 2005, respectively, and $1,118 and $563 for the six months ended
June 30, 2006 and 2005, respectively.



|(13) | Commitments and Contingencies 
|---- | -------------------------------

Leases

The Company leases a majority of its field office facilities under non-cancelable operating leases.

Indemnifications

The Companys
license and services agreements include a limited indemnification provision for claims from third-parties relating to the Companys intellectual property. Such indemnification provisions are accounted for in accordance with SFAS No. 5,
Accounting for Contingencies. The indemnification is limited to the amount paid by the customer. At June 30, 2006, the Company is not aware of any material liabilities arising from these indemnifications.

Legal Proceedings

From time to time
the Company is involved in various disputes and litigation matters that arise from the ordinary course of business. These include disputes and lawsuits relating to intellectual property rights, licensing, contracts and employee relation matters. The
Company believes that the outcome of current litigation, individually and in the aggregate, will not have a material affect on the Companys results of operations.



|(14) | Related Party Transactions  Certain members of the Companys Board of Directors also serve on the Board of Directors of certain of the Companys
customers. The Company recognized revenue from these customers of $8,546 and $5,562 during the three months ended June 30, 2006 and 2005, respectively, and $15,778 and $11,776 for the six months ended June 30, 2006 and 2005, respectively.
The related party revenue amounts represented 4.8% and 3.6% of the Companys total revenues for the three months ended June 30, 2006 and 2005 respectively, and 4.4% and 3.7% for the six months ended June 30, 2006 and 2005,
respectively. Management believes the transactions between the Company and these customers were carried out on an arms length basis.
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(15) | Segment Reporting  SFAS No. 131, Disclosures about Segments of an Enterprise and Related Information (SFAS No. 131), requires disclosures of
certain information regarding operating segments, products and services, geographic areas of operation and major customers. To determine what information to report under SFAS No. 131, the Company reviewed the Chief Operating Decision
Makers (CODM) method of analyzing the operating segments to determine resource allocations and performance assessments. The Companys CODMs are the Chief Executive Officer and the President.
|---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The Company operates exclusively in the electronic design automation (EDA) industry. The Company markets its products and services worldwide, primarily to
large companies in the military/aerospace, communications, computer, consumer electronics, semiconductor, networking, multimedia and transportation industries. The Company sells and licenses its products through its direct sales force in North
America, Europe, Japan and the Pacific Rim and through distributors where third parties can extend sales reach more effectively or efficiently. The Companys reportable segments are based on geographic area.



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##### Table of Contents

All intercompany revenues and expenses are eliminated in computing revenues and operating income (loss).
The corporate component of operating income (loss) represents research and development, corporate marketing and selling, corporate general and administration, special charges and merger and acquisition related charges. Reportable segment information
is as follows:



|                        |  |                             |          |   |                           |   |         |      |  |   |          |   |  |   |          |  
|----------------------- |  | --------------------------- | -------- | - | ------------------------- | - | ------- | ---- |  | - | -------- | - |  | - | -------- | -
|                        |  | Three months ended June 30, |          |   | Six months ended June 30, |  
|                        |  | 2006                        |          |   | 2005                      |   |         | 2006 |  |   | 2005     |  
|Revenues                |  |                             |          |   |                           |   |         |      |  |   |          |   |  |   |          |  
|Americas                |  | $                           | 79,676   |   |                           | $ | 71,112  |      |  | $ | 143,365  |   |  | $ | 142,199  |  
|Europe                  |  |                             | 41,820   |   |                           |   | 42,245  |      |  |   | 91,499   |   |  |   | 86,033   |  
|Japan                   |  |                             | 24,825   |   |                           |   | 23,663  |      |  |   | 63,806   |   |  |   | 56,085   |  
|Pacific Rim             |  |                             | 32,112   |   |                           |   | 17,816  |      |  |   | 56,085   |   |  |   | 34,853   |  
|                        |  |                             |          |   |                           |   |         |      |  |   |          |   |  |   |          |  
|Total                   |  | $                           | 178,433  |   |                           | $ | 154,836 |      |  | $ | 354,755  |   |  | $ | 319,170  |  
|                        |  |                             |          |   |                           |   |         |      |  |   |          |   |  |   |          |  
|Operating income (loss) |  |                             |          |   |                           |   |         |      |  |   |          |   |  |   |          |  
|Americas                |  | $                           | 45,479   |   |                           | $ | 36,729  |      |  | $ | 77,926   |   |  | $ | 75,391   |  
|Europe                  |  |                             | 19,034   |   |                           |   | 19,015  |      |  |   | 46,365   |   |  |   | 39,445   |  
|Japan                   |  |                             | 15,176   |   |                           |   | 13,958  |      |  |   | 43,863   |   |  |   | 35,117   |  
|Pacific Rim             |  |                             | 25,543   |   |                           |   | 13,125  |      |  |   | 44,005   |   |  |   | 25,095   |  
|Corporate               |  |                             | (104,120 | ) |                           |   | (99,113 | )    |  |   | (212,020 | ) |  |   | (194,384 | )
|                        |  |                             |          |   |                           |   |         |      |  |   |          |   |  |   |          |  
|Total                   |  | $                           | 1,112    |   |                           | $ | (16,286 | )    |  | $ | 139      |   |  | $ | (19,336  | )
|                        |  |                             |          |   |                           |   |         |      |  |   |          |   |  |   |          |  



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The Company segregates revenue into three categories of similar products and services. These categories
include integrated circuit design, systems design and professional services. The integrated circuit design and systems design categories include both product and support revenues. Revenue information is as follows:



|                          |  |                            |         |                          |   |         |  |      |         |  |   |        
|------------------------- |  | -------------------------- | ------- | ------------------------ | - | ------- |  | ---- | ------- |  | - | -------
|                          |  | Three months endedJune 30, |         | Six months endedJune 30,
|                          |  | 2006                       |         | 2005                     |   | 2006    |  | 2005
|Revenues                  |  |                            |         |                          |   |         |  |      |         |  |   |        
|Integrated Circuit Design |  | $                          | 127,772 |                          | $ | 103,442 |  | $    | 251,329 |  | $ | 216,746
|Systems Design            |  |                            | 42,887  |                          |   | 44,190  |  |      | 88,543  |  |   | 87,658 
|Professional Services     |  |                            | 7,774   |                          |   | 7,204   |  |      | 14,883  |  |   | 14,766 
|                          |  |                            |         |                          |   |         |  |      |         |  |   |        
|Total                     |  | $                          | 178,433 |                          | $ | 154,836 |  | $    | 354,755 |  | $ | 319,170
|                          |  |                            |         |                          |   |         |  |      |         |  |   |        



|(16) | Recent Accounting Pronouncements In July 2006, the Financial Accounting Standards Board (FASB) issued FASB Interpretation 48, Accounting for Income Tax
Uncertainties (FIN 48). FIN 48 defines the threshold for recognizing the benefits of tax return positions in the financial statements as more-likely-than-not to be sustained by the taxing authority. The recently issued literature
also provides guidance on the derecognition, measurement and classification of income tax uncertainties, along with any related interest and penalties. FIN 48 also includes guidance concerning accounting for income tax uncertainties in interim
periods and increases the level of disclosures associated with any recorded income tax uncertainties. FIN 48 is effective for fiscal years beginning after December 15, 2006. The differences between the amounts recognized in the statements of
financial position prior to the adoption of FIN 48 and the amounts reported after adoption will be accounted for as a cumulative-effect adjustment recorded to the beginning balance of retained earnings. The Company is currently assessing the impact
of FIN 48 on its consolidated financial position and results of operations.
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In June 2006, the Emerging Issues Task Force
issued EITF 06-3, How Taxes Collected from Customers and Remitted to Governmental Authorities Should Be Presented in the Income Statement (That Is, Gross versus Net Presentation) (EITF 06-3) to clarify diversity in practice on the
presentation of different types of taxes in the financial statements. The Task Force concluded that, for taxes within the scope of the issue, a company may adopt a policy of presenting taxes either gross within revenue or net. That is, it may
include charges to customers for taxes within revenues and the charge for the taxes from the taxing authority within cost of sales, or, alternatively, it may net the charge to the customer and the charge from the taxing authority. If taxes subject
to this Issue are significant, a company is required to disclose its accounting policy for presenting taxes and the amounts of such taxes that are recognized on a gross basis. The guidance in this consensus is effective for the first interim
reporting period beginning after December 15, 2006. The Company does not expect the adoption of EITF 06-3 to result in a change to the Companys accounting policy or have an effect on the Companys condensed consolidated financial
statements.



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|Item 2. | Managements Discussion and Analysis of Results of Operations and Financial Condition
|------- | -------------------------------------------------------------------------------------

(All numerical references in thousands, except for percentages and per share data)

Overview

THE COMPANY

The Company is a supplier of electronic design
automation (EDA) systems  advanced computer software, emulation hardware systems and intellectual property designs and databases used to automate the design, analysis and testing of electronic hardware and embedded systems software in
electronic systems and components. The Company markets its products and services worldwide, primarily to large companies in the communications, computer, consumer electronics, semiconductor, networking, multimedia, military/aerospace, and
transportation industries. Through the diversification of the Companys customer base among these various customer markets, the Company attempts to reduce its exposure to fluctuations within each market. The Company sells and licenses its
products through its direct sales force and a channel of distributors and sales representatives. In addition to its corporate offices in Wilsonville, Oregon, the Company has sales, support, software development and professional service offices
worldwide.

BUSINESS ENVIRONMENT

Business for
the first half of 2006 was very strong, centered largely in the Integrated Circuit (IC) Design to Silicon product line, with total system and software bookings up 33% compared to the prior year. Bookings are the value of executed orders during a
period for which revenue has been or will be recognized within six months for products and within twelve months for professional services and training. During the three months ended June 30, 2006, the Company experienced a 24% increase in
system and software revenues year over year. With this growth in system and software revenues, the Company has experienced four consecutive quarters of year over year growth. The ten largest transactions for the second quarter of 2006 accounted for
approximately 43% of total system and software bookings as compared to 39% in the second quarter of 2005. The number of new customers during the three months ended June 30, 2006 was down 7% from the levels experienced during the comparable
period of 2005.

After a significant year over year bookings decline in the first half of 2005, the Calibre family of products had a strong second half of
2005. This strength continued during the first half of 2006, with the Calibre family of products experiencing an increase of 188% in system and software bookings over the comparable period of 2005.

The Companys management believes 2006 looks positive for the Company and for the EDA industry in general. While the strength experienced during the first half of
2006 was not based on deal renewals, the Company does expect 2006 to be a strong renewal year, and these contracts should benefit from the increased R&D spending of our customers compared to three years ago when R&D spending in electronics
was depressed. Beyond the growth in the Companys family of Calibre products, the strength seen in Scalable Verification offers many opportunities for growth in 2006. The Company also expects increased demand for EDA products for
non-traditional markets, such as automotive electronic design and embedded software.

The Company will continue its strategy of developing best in class
point tools with number one market share potential. This strategy creates a diversified product portfolio for the Company that solves customers critical design problems. The Companys management believes that this product strategy, in
conjunction with a customer diversification strategy, has helped reduce the impact of marketplace fluctuations in the past and should continue to do so in the future.

License Model Mix

License model trends can have a material impact on various aspects of the Companys
business. See Critical Accounting Policies  Revenue Recognition on page 23 for a description of the types of product licenses sold by the Company. As the mix among perpetual licenses, fixed term licenses (term) with upfront revenue
recognition and term licenses with ratable revenue recognition (which includes due and payable revenue recognition) shifts, revenues, earnings, cash flow and days sales outstanding (DSO) are



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either positively or negatively affected. The year ended December 31, 2005 marked the fifth consecutive year in which, as a percentage of product
revenue, term revenue increased while perpetual revenue decreased. This trend continued during the six months ended June 30, 2006 and the Company believes this trend will continue for the full year 2006. This trend was primarily the result of
two factors. First, the Companys customers continue to move toward the term license model, which provides the customer with greater flexibility for product usage, including the option to share the products between multiple locations and
reconfigure consumption at regular intervals from a fixed product list. As such, some of the Companys customers have converted their existing installed base from perpetual to term licenses. Second, the weakness in the high-technology economy
has disproportionately impacted the Companys smaller customers. Historically these customers have purchased under the perpetual license model.

Under
this ongoing shift from perpetual licenses to term licenses with upfront revenue recognition, which the Companys management views as a positive trend, the Company expects no significant impact to earnings, but a negative impact on cash flow
and DSO. As customers move away from perpetual licenses and into term licenses, the renewability and repeatability of the Companys business is increased. This provides opportunity for increased distribution of newer products earlier in their
lifecycles.

Product Developments

During the
first half of 2006, the Company continued to execute its strategy of focusing on new customer problem areas, as well as building upon its well-established product families. The Companys management believes that customers, faced with
leading-edge design challenges, choose the best products in each category to build their design environment. Through both internal development and strategic acquisitions, the Company has focused on areas where it believes it can build a leading
market position or extend an existing leading market position.

During the three months ended March 31, 2006, the Company launched a number of new
products. In January, the Company launched Calibre OPCverify. Used after the design has been corrected for optical and process effects, the tool simulates the design of the mask across the lithographic process window ensuring there are no
significant yield detractors before committing to a very expensive mask set. In March, the Company extended its move into IC process variation management with Calibre LFD (Litho Friendly Design) which permits designers to make tradeoffs to increase
design resilience to process variation. Calibre MDP (Mask Data Preparation) was also extended to offer a 45nm process version to handle the greatly increased complexity of mask preparation for ICs at the 45nm process node. Calibre DFM
(Design for Manufacturing) technologies were also adopted into the common 65nm process platform of IBM, Chartered and Samsung.

During the three months
ended June 30, 2006, the Company launched additional new products. In April, the Company released ExtremeAR, a printed circuit board routing product that improves the routing time of large boards. This product allows designers to create better
and cheaper boards by running more routing iterations during the design cycle. In May, the Company launched a new version of its Questa verification platform which offered new technologies and methodologies to improve the productivity of design
verification tasks. In June, the Company launched Catapult SL, a new version of its ANSI C++ synthesis tool, which extends the tool from block level to multi-block sub-system design of compute intensive hardware found in multimedia,
communications and consumer electronic applications.

The Companys management believes that the development and commercialization of EDA software
tools is usually a multi-year process with limited customer adoption in the first years of tool availability. Once tools are adopted, however, their life spans tend to be long and healthy. The Companys management believes that the
Companys relatively young and diverse product lines are positioned for growth over the long-term.

Q2 2006 Financial Performance



| |  |  | Total revenues were $178,433 and $354,755 for the three and six months ended June 30, 2006, respectively, a 15% and 11% increase over the comparable periods of
2005, respectively. For the three month period, the increase resulted from strength in IC Design to Silicon, Integrated System Design and Service and Support, partially offset by weakness in the Companys Automotive
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | product line. In the second quarter of 2005, the Company closed a large term transaction with upfront revenue recognition in the Automotive product line.
With no comparable transaction in second quarter of 2006, the Automotive product line showed first half weakness. Revenue strength in IC Design to Silicon was led by the Calibre product family. Revenue strength in Integrated Systems Design was
primarily concentrated in the Companys printed circuit board product line. For the six month period, the increase was due to strength in IC Design to Silicon, Integrated System Design and Service and Support, partially offset by weakness in
the Companys Automotive and Emulation product lines. Revenue strength in IC Design to Silicon was led by the Calibre product lines, while revenue strength in Integrated System Design was led by the Companys printed circuit board product
line.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | System and software revenues were $101,226 and $204,166 for the three and six months ended June 30, 2006, respectively, a 24% and 18% increase over the comparable periods of
2005, respectively. Product revenue split by license model for the second quarter of 2006 was 53% term with upfront revenue recognition, 31% perpetual and 16% term with ratable revenue recognition (which includes due and payable revenue
recognition), compared to second quarter 2005 product revenue splits of 46% term with upfront revenue recognition, 35% perpetual and 19% term with ratable revenue recognition.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Service and support revenues were $77,207 and $150,589 for the three and six months ended June 30, 2006, respectively, a 5% and 3% increase over the comparable periods of 2005,
respectively.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | By geography, revenues in the Americas increased 12% and 1% for the three and six months ended June 30, 2006, respectively, as compared to the comparable periods of 2005.
Revenues in Europe decreased 1% for the three months ended June 30, 2006, while revenues in Europe increased 6% for the six months ended June 30, 2006. Revenues in Japan increased 5% and 14% in the three and six months ended June 30,
2006, respectively, as compared to the comparable periods of 2005, and increased 80% and 61%, respectively, in Pacific Rim, as compared to the comparable periods of 2005. The Americas contributed the largest share of revenues at nearly 45% and 40%,
for the three and six months ended June 30, 2006, respectively, a decrease from 46% and 45%, respectively, in the comparable periods of 2005.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Net loss for the three months ended June 30, 2006 was $448 compared to a net loss of $6,843 in the comparable period of 2005, while for the six months ended June 30, 2006,
net loss was $6,308 compared to a net loss of $11,229 in the comparable period of 2005.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Trade accounts receivable, net decreased to $233,361 at June 30, 2006, down less than 1% from $234,866 at December 31, 2005. Average days sales outstanding increased to
118 days as of June 30, 2006 from 96 days at December 31, 2005.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Cash generated from operating activities was $46,215 for the six months ended June 30, 2006 compared to $15,449 for the comparable period in 2005. At June 30, 2006, cash,
cash equivalents and short-term investments were $136,332, up 19% from $114,410 at December 31, 2005.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Critical Accounting Policies

The Companys discussion and analysis of its financial condition and results of operations are based upon the Companys consolidated
financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of these financial statements requires the Company to make estimates and judgments that affect the reported amounts of
assets, liabilities and contingencies as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The Company evaluates its estimates on an on-going basis. The Company bases its
estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not
readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. The Company believes the following are the critical accounting estimates and judgments used in the preparation of its
consolidated financial statements.

Revenue Recognition

The Company reports revenue in two categories based upon how the revenue is generated: (i) system and software and (ii) service and support.



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System and software revenues  The Company derives system and software revenues from the sale of licenses of
software products and emulation hardware systems.

The Company licenses software using two different license types:

1. Term licenses are for a specified time period, typically three years with payments spread over the license term, and do not provide the customer with the right to use
the product after the end of the term. The Company generally recognizes product revenue from term installment license agreements upon shipment and start of the license term. The Company uses these agreements as a standard business practice and has a
history of successfully collecting under the original payment terms without making concessions on payments, products or services. If the Company no longer had a history of collecting without providing concessions on term agreements, then revenue
would be required to be recognized as the payments become due and payable over the license term. This change would have a material impact on the Companys near-term results of operations. In a situation in which a risk of concession may exist
on a term license agreement, revenue is recognized on a due and payable basis, which is the lesser of the ratable portion of the entire fee or the customer installments as they become due and payable. In a term license agreement where the Company
provides the customer with rights to unspecified or unreleased future products, revenue is recognized ratably over the license term.

2. Perpetual licenses
provide the customer with the right to use the product in perpetuity and typically do not provide for extended payment terms. The Company recognizes product revenue from perpetual license agreements upon delivery to the customer. If the agreement
provides for customer payment terms that are different than the standard payment terms in the customers jurisdiction, product revenue is recognized as payments become due and payable.

Service and support revenues - Service and support revenues consist of revenues from software and hardware maintenance services and professional services, which
include consulting services, training services and other services. The Company records service revenue as the services are provided to the customer. Support revenue is recognized over the support term. For multi-element arrangements that include
support, support is allocated based on vendor specific objective evidence (VSOE) of the fair value of support. For term and perpetual licenses, VSOE is established by the price charged when such support is sold separately.

The Company determines whether software product revenue recognition is appropriate based upon the evaluation of whether the following four criteria have been met:



| | 1. | Persuasive evidence of an arrangement exists  An agreement signed by the customer and the Company or a qualified customer purchase order.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | Delivery has occurred  The software has been shipped, the customer is in possession of the software or the software has been made available to the customer through electronic
delivery.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 3. | Fee is fixed or determinable  The amount of the fee and the due date have been fixed at execution of the arrangement without the possibility of future adjustments or
concessions.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4. | Collectibility is probable  The customer is expected to pay for products or services without the Company providing future concessions to the customer.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------

Valuation of Trade Accounts Receivable

The Company maintains allowances for doubtful accounts on trade accounts receivable and term receivables, long-term for estimated losses resulting from the inability of its customers to make required payments. The Company regularly
evaluates the collectibility of its trade accounts receivable based on a combination of factors. When it becomes aware of a specific customers inability to meet its financial obligations, such as in the case of bankruptcy or deterioration in
the customers operating results or financial position, a specific reserve for bad debt is recorded to reduce the related receivable to the amount believed to be collectible. The Company also records unspecified reserves for bad debt for all
other customers based on a variety of factors including length of time the receivables are



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past due, the financial health of the customers, the current business environment and historical experience. If circumstances related to specific customers
change, estimates of the recoverability of receivables would be adjusted resulting in either additional selling expense or a reduction in selling expense in the period such determination was made.

Valuation of Deferred Tax Assets

Deferred tax assets are
recognized for deductible temporary differences, net operating loss carryforwards and credit carryforwards if it is more likely than not that the tax benefits will be realized. The Company has considered future taxable income and ongoing prudent and
feasible tax planning strategies in assessing the need for valuation allowances. The Company has recorded a valuation allowance to reduce its deferred tax assets to the amount that is more likely than not to be realized. In the event the Company was
to determine that it would be able to realize its deferred tax assets in the future in excess of its net recorded amount, an adjustment to the deferred tax asset would increase either income or contributed capital, or decrease goodwill, in the
period such determination was made. Also, if the Company was to determine that it would not be able to realize all or part of its net deferred tax asset in the future, an adjustment to increase the valuation allowance on such net deferred tax assets
would be charged to expense in the period such determination was made.

Income Tax Reserves

The Company has reserves for taxes to address potential exposures involving tax positions that could be challenged by taxing authorities, even though the Company believes
that the positions taken on previously filed tax returns are appropriate. The tax reserves are reviewed as circumstances warrant and adjusted as events occur that affect the Companys potential liability for additional taxes. The Company is
subject to income taxes in the United States and in numerous foreign jurisdictions and in the ordinary course of business, there are many transactions and calculations where the ultimate tax determination is uncertain.

Goodwill, Intangible Assets and Long-Lived Assets

The Company
reviews long-lived assets and intangible assets for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be recoverable. Recoverability of an asset is determined by comparing its carrying amount
to the forecasted undiscounted net cash flows of the operation to which the asset relates. If the operation is determined to be unable to recover the carrying amount of its assets, then long-lived assets are written down to their estimated fair
value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets. Goodwill and intangible assets with indefinite lives are tested for impairment annually and whenever there is an impairment
indicator using a fair value approach. In the event that, in the future, it is determined that the Companys goodwill, intangible or other long-lived assets have been impaired, an adjustment would be made that would result in a charge for the
write-down in the period that determination was made.

Inventory

The Company purchases and commits to purchase inventory based upon forecasted shipments of its emulation hardware systems. The Company evaluates, on a quarterly basis, the need for inventory reserves based on
projections of systems expected to ship within six months. Reserves for excess and obsolete inventory are established to account for the differences between forecasted shipments and the amount of purchased and committed inventory. The Company also
has emulation hardware system demonstration and loan equipment at customer locations in anticipation of securing sales. The cost of the emulation hardware system demonstration and loan equipment is amortized to selling expense using a six month
useful life.

Restructuring Charges

The Company
has recorded restructuring charges within special charges in the condensed consolidated statements of operations in connection with its plans to better align the cost structure with projected operations in the future. In accordance with Statement of
Financial Accounting Standards (SFAS) No. 146, Accounting for Costs Associated with Exit or Disposal Activities, the Company records liabilities for costs associated with exit or disposal activities when the liability is
incurred.



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The Company has recorded restructuring charges in connection with employee rebalances based on estimates of the expected
costs associated with severance benefits. If the actual cost incurred exceeds the estimated cost, additional special charges will be recognized. If the actual cost is less than the estimated cost, a benefit to special charges will be recognized.

The Company has also recorded restructuring charges in connection with excess leased facilities to offset future rent, net of estimated sublease income
that could be reasonably obtained, of the abandoned office space and to write off leasehold improvements on abandoned office space. The Company works with external real estate experts in each of the markets where properties are located to obtain
assumptions used to determine a reasonable estimate of the net loss. The Companys estimates of expected sublease income could change based on factors that affect the Companys ability to sublease those facilities such as general economic
conditions and the real estate market. If the real estate markets worsen and the Company is not able to sublease the properties as expected, additional adjustments may be required, which would result in additional special charges in the period such
determination was made. Likewise, if the real estate market strengthens and the Company is able to sublease the properties earlier or at more favorable rates than projected, a benefit to special charges will be recognized.

Accounting for Stock-Based Compensation

Effective
January 1, 2006, the Company adopted the provisions of SFAS No. 123 (revised 2004), Share-Based Payment (SFAS 123(R)). SFAS 123(R) establishes standards for accounting for transactions in which an entity exchanges its
equity instruments, such as stock options, for goods or services, such as the services of the entitys employees. SFAS 123(R) also addresses transactions in which an entity incurs liabilities in exchange for goods or services that are
based on the fair value of the entitys equity instruments or that may be settled by the issuance of those equity instruments. SFAS 123(R) eliminates the ability to account for stock-based compensation transaction using the intrinsic value
method under Accounting Principles Board Opinion No. 25 Accounting for Stock Issued to Employees (APB 25) and generally requires instead that such transactions be accounted for using a fair-value based method. Accordingly, the
Company measures stock-based compensation cost at the grant date, based on the fair value of the award, and recognizes the expense over the employees requisite service period using the modified prospective method. The measurement of
stock-based compensation cost is based on several criteria including, but not limited to, the valuation model used and associated input factors such as expected term of the award, stock price volatility, dividend rate, risk free interest rate, and
award cancellation rate. The input factors to use in the valuation model are based on subjective future expectations combined with management judgment. If there is a difference between the assumptions used in determining stock-based
compensation cost and the actual factors which become known over time, the Company may change the input factors used in determining stock-based compensation costs. These changes may materially impact the results of operations in the period such
changes are made.

RESULTS OF OPERATIONS

REVENUES AND GROSS MARGINS



|                                         |  |      |         |   |        |    |   |      |   |         |  
|---------------------------------------- |  | ---- | ------- | - | ------ | -- | - | ---- | - | ------- | -
|Three months ended June 30,              |  | 2006 |         |   | Change |    |   | 2005 |  
|System and software revenues             |  | $    | 101,226 |   |        | 24 | % |      | $ | 81,375  |  
|System and software gross margin percent |  |      | 93      | % |        |    |   |      |   | 91      | %
|Service and support revenues             |  |      | 77,207  |   |        | 5  | % |      |   | 73,461  |  
|Service and support gross margin percent |  |      | 73      | % |        |    |   |      |   | 72      | %
|                                         |  |      |         |   |        |    |   |      |   |         |  
|Total revenues                           |  | $    | 178,433 |   |        |    |   |      | $ | 154,836 |  
|                                         |  |      |         |   |        |    |   |      |   |         |  
|                                         |  |      |        
|Six months ended June 30,                |  | 2006 |         |   | Change |    |   | 2005 |  
|System and software revenues             |  | $    | 204,166 |   |        | 18 | % |      | $ | 172,935 |  
|System and software gross margin percent |  |      | 93      | % |        |    |   |      |   | 91      | %
|Service and support revenues             |  |      | 150,589 |   |        | 3  | % |      |   | 146,235 |  
|Service and support gross margin percent |  |      | 73      | % |        |    |   |      |   | 72      | %
|                                         |  |      |         |   |        |    |   |      |   |         |  
|Total revenues                           |  | $    | 354,755 |   |        |    |   |      | $ | 319,170 |  
|                                         |  |      |         |   |        |    |   |      |   |         |  



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System and Software

System and software revenues are derived from the sale of licenses of software products and emulation hardware systems. The increase for the three and six months ended June 30, 2006 was due primarily to strength in IC Design to Silicon
and Integrated System Design. Revenue strength in IC Design to Silicon was led by the Calibre product lines, while revenue strength in Integrated System Design was led by the Companys printed circuit board product line. In the second quarter
of 2005, the Company closed a large term with upfront revenue recognition transaction in the Automotive product line. With no comparable transaction in second quarter of 2006, the Automotive product line showed first half weakness. The increase in
the first six months of 2006 was also partially offset by weakness in Emulation product revenues. The increase in revenue in the second quarter and first half of 2006 was also partially offset by an unfavorable currency impact of approximately 1%
and 2%, respectively, due to the strengthening of the dollar during these periods as compared to the comparable periods of 2005.

System and software gross
margins increased for the three and six months ended June 30, 2006 from the comparable period of 2005 due primarily to an increase in higher margin software product revenues, which was offset by the recording of additional inventory reserves.
Emulation hardware systems inventory was reduced by $697 and $1,555 for the three and six months ended June 30, 2006, respectively, compared to $507 and $1,736 for the comparable periods of 2005. These reserves reduce inventory to the amount
that is expected to ship within six months on the assumption that any excess would be obsolete. Also, certain previously reserved-for inventory of $2,470 and $3,165 was sold during the three and six months ended June 30, 2006, compared to
$1,736 and $2,990 for the comparable periods of 2005.

Amortization of purchased technology to system and software cost of revenues was $3,421 and $6,656
for the three and six months ended June 30, 2006, respectively, compared to $2,700 and $5,413 for the comparable periods of 2005. The increase in amortization of purchased technology was primarily due to three acquisitions during the second
half of 2005 and two in the first half of 2006. Purchased technology costs are amortized over two to five years to system and software cost of revenues.

Service and Support

Service and support revenues consist of revenues from support contracts and professional services, which include
consulting services, training services and other services. The increase in service and support revenues for the three and six months ended June 30, 2006 was primarily attributable to the growth in the installed base of customers under support
contracts, partially offset by an unfavorable currency impact due to the strengthening of the dollar as compared to the comparable periods of 2005.

Service and support gross margins increased for the three and six months ended June 30, 2006 compared to the same periods in 2005 primarily due to higher service and support revenues.

Geographic Revenues Information



|            |  |                             |         |                           |    |    |      |   |         |  |        |         |  |      |   |  |   |        
|----------- |  | --------------------------- | ------- | ------------------------- | -- | -- | ---- | - | ------- |  | ------ | ------- |  | ---- | - |  | - | -------
|            |  | Three months ended June 30, |         | Six months ended June 30,
|            |  | 2006                        |         | Change                    |    |    | 2005 |   | 2006    |  | Change |         |  | 2005
|Americas    |  | $                           | 79,676  |                           | 12 | %  |      | $ | 71,112  |  | $      | 143,365 |  | 1    | % |  | $ | 142,199
|Europe      |  |                             | 41,820  |                           | (1 | %) |      |   | 42,245  |  |        | 91,499  |  | 6    | % |  |   | 86,033 
|Japan       |  |                             | 24,825  |                           | 5  | %  |      |   | 23,663  |  |        | 63,806  |  | 14   | % |  |   | 56,085 
|Pacific Rim |  |                             | 32,112  |                           | 80 | %  |      |   | 17,816  |  |        | 56,085  |  | 61   | % |  |   | 34,853 
|            |  |                             |         |                           |    |    |      |   |         |  |        |         |  |      |   |  |   |        
|Total       |  | $                           | 178,433 |                           | 15 | %  |      | $ | 154,836 |  | $      | 354,755 |  | 11   | % |  | $ | 319,170
|            |  |                             |         |                           |    |    |      |   |         |  |        |         |  |      |   |  |   |        

Revenues in the Americas increased for the three months and six months ended June 30, 2006 as compared to the
comparable periods of 2005. The second quarter increase was due primarily to higher software product revenue, while the year-to-date increase was primarily attributable to an increase in support revenue partially offset by a decrease in product
revenue. Revenues outside the Americas represented 55% and 60% of total revenues for the three and six months ended June 30, 2006, compared to 54% and 55% for the comparable periods of 2005. Most large European revenue contracts are denominated
and paid to the Company in the United States dollar. The effects of exchange rate differences from the European currencies to the United States dollar negatively impacted European



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revenues by approximately 1% for the three and six months ended June 30, 2006. Exclusive of currency effects, the increase in revenues for the six
months ended June 30, 2006 from the comparable period of 2005 was primarily due to higher software product revenue. The effects of exchange rate differences from the Japanese yen to the United States dollar negatively impacted Japanese revenues
by approximately 6% and 9% for the three and six months ended June 30, 2006. Exclusive of currency effects, the increase in revenues for the three months ended June 30, 2006 from the comparable period of 2005 was due to an increase in
software product revenue, while the increase in revenues for the six months ended June 30, 2006 was due to an increase in software product revenues partially offset by a decline in emulation product and support revenues. Revenues in the Pacific
Rim increased for the three and six months ended June 30, 2006 from the comparable periods of 2005 primarily due to higher software product revenues and an increase in support revenue. The Company believes that fluctuations in comparable
periods from one year to the next may be due to the size and timing of orders from large customers. Since the Company generates more than half of its revenues outside of the United States and expects this to continue in the future, revenue results
should continue to be impacted by the effects of future foreign currency fluctuations.

OPERATING EXPENSES



|                                       |  |                             |        |                           |      |    |      |   |        |  |        |         |  |      |    |  |   |        
|-------------------------------------- |  | --------------------------- | ------ | ------------------------- | ---- | -- | ---- | - | ------ |  | ------ | ------- |  | ---- | -- |  | - | -------
|                                       |  | Three months ended June 30, |        | Six months ended June 30,
|                                       |  | 2006                        |        | Change                    |      |    | 2005 |   | 2006   |  | Change |         |  | 2005
|Research and development               |  | $                           | 55,293 |                           | (2   | %) |      | $ | 56,193 |  | $      | 110,356 |  | 3    | %  |  | $ | 107,503
|Marketing and selling                  |  | $                           | 69,334 |                           | 6    | %  |      | $ | 65,324 |  | $      | 136,305 |  | 3    | %  |  | $ | 132,899
|General and administration             |  | $                           | 22,876 |                           | 22   | %  |      | $ | 18,752 |  | $      | 43,795  |  | 17   | %  |  | $ | 37,460 
|Amortization of intangible assets      |  | $                           | 1,121  |                           | 15   | %  |      | $ | 972    |  | $      | 2,247   |  | 7    | %  |  | $ | 2,094  
|Special charges                        |  | $                           | 917    |                           | (27  | %) |      | $ | 1,264  |  | $      | 6,153   |  | 139  | %  |  | $ | 2,577  
|Merger and acquisition related charges |  | $                           |       |                           | (100 | %) |      | $ | 750    |  | $      | 180     |  | (76  | %) |  | $ | 750    

Research and Development

The change in R&D costs for the three and six months ended June 30, 2006 as compared to the comparable periods of 2005 was favorably impacted by a $4,750 charge in the second quarter of 2005 for a purchase of
technology that had not reached technological feasibility. This technology is expected to be incorporated and provide enhancements for the Calibre product family in 2006. Excluding the impact of this charge, R&D costs increased 7% for the three
and six months ended June 30, 2006 over the comparable periods of 2005. The increase was due primarily to (i) higher variable compensation, (ii) the year-over year effect of annual salary increases, and (iii) higher headcount in
the following areas: IC Design to Silicon, Scalable Verification, and Embedded Systems, primarily due to acquisitions in the last twelve months. The increase in the three and six months ended June 30, 2006 was also due to charges of $1,567 and
$2,866, respectively, related to the expensing of share based payments as required under SFAS 123(R) beginning in January 2006. These increases were partially offset by reductions in the intellectual property division due to the elimination of a
product line and reductions in the emulation division.

Marketing and Selling

Marketing and selling costs increased for the three and six months ended June 30, 2006 over the comparable periods of 2005 due primarily to an increase in labor related expenses and to charges of $1,296 and
$2,306 in the three and six months ended of 2006, respectively, related to the expensing of share based payments as required under SFAS 123(R). These increases were partially offset by the favorable impact of approximately 2% due to the
strengthening of the dollar for the six months ended June 30, 2006 as compared to the comparable period of 2005.

General and Administration

General and administration expenses increased for the three and six months ended June 30, 2006 over the comparable periods of 2005 due
primarily to (i) higher variable compensation expense (ii) the year-over year effect of annual salary increases, and (iii) an increase in consulting and professional services. The increase in the three and six months ended
June 30, 2006 was also due to a charge of $490 and $930, respectively, for the expensing of share based payments as required under SFAS 123(R). The increases were partially offset by a favorable impact of approximately 1% and 2% due to the
strengthening of the dollar for the three and six months ended June 30, 2006 as compared to the comparable periods of 2005.



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Special Charges

For the six months ended June 30, 2006, the Company recorded special charges of $6,153. These charges primarily consisted of costs incurred for employee terminations and are due to the Companys reduction of personnel resources
driven by modifications of business strategy or business emphasis and by the assimilation of acquired businesses.

The Company rebalanced its workforce by
73 employees during the six months ended June 30, 2006. The reduction impacted several employee groups. Employee severance costs of $3,944 included severance benefits, notice pay and outplacement services. The total rebalance charge represents
the aggregate of numerous unrelated rebalance plans, none of which was individually material to the Companys financial position or results of operations. Termination benefits were communicated to the affected employees prior to the end of the
quarter in which the charge was recorded. Approximately one-third of these costs were paid during the first half of 2006. The Company expects the remainder of these costs to be paid during the second half of 2006. There have been no significant
modifications to the amount of these charges.

In addition, special charges for the six months ended June 30, 2006 included costs of $1,625 incurred
as a result of residual actions related to the discontinuation of one of the Companys intellectual property product lines in the fourth quarter of 2005. These costs included $909 in non-cancelable lease payments, net of sublease income,
related to the abandonment of excess leased facility space in Europe. Non-cancelable lease payments on this excess leased facility space will be paid over eleven years. Other costs incurred in relation to the product-line discontinuation included a
loss of $640 on the abandonment or disposal of property and equipment primarily related to leasehold improvements and $76 for other costs.

The Company
rebalanced its workforce by 54 employees during the six months ended June 30, 2005. The reduction impacted several employee groups. Employee severance costs of $2,348 included severance benefits, notice pay and outplacement services. The total
rebalance charge represented the aggregate of numerous unrelated rebalance plans, none of which was individually material to the Companys financial position or results of operations. Termination benefits were communicated to the affected
employees prior to the end of the quarter in which the charge was recorded. The majority of these costs were paid during the first nine months of 2005. There have been no significant modifications to the amount of these charges. Other costs in the
first six months of 2005 of $229 primarily included legal costs incurred to sever any ongoing obligation related to a defined benefit pension plan acquired in connection with an acquisition in 1999 and excess leased facility costs.

Merger and Acquisition Related Charges

In January 2006, the
Company acquired 100% of the shares of EverCAD Corporation, a privately held EDA company based in Taiwan that specializes in advanced circuit simulation and analysis tools. The Company will integrate the acquired technology into its analog mixed
signal verification product family. The total purchase price including acquisition costs was $5,288. The excess of tangible assets acquired over liabilities assumed was $1,879. The cost of the acquisition was allocated on the basis of the estimated
fair value of assets acquired and liabilities assumed. The purchase accounting allocations resulted in a charge for in-process research and development of $180, goodwill of $2,112, technology of $1,100, and other identified intangible assets of
$390, net of related deferred tax liability of $373. The technology and the other identified intangible assets is being amortized to cost of revenues and operating expenses, respectively over three years.

In June 2005, the Company purchased certain assets and assumed certain liabilities from Aptix Corporation (Aptix), a provider of reconfigurable prototyping products.
Aptix was in Chapter 11 bankruptcy at the time the purchase agreement was negotiated and closed. The purchase was an investment in a niche market that complemented the more expensive emulation systems sold by the Company. The total purchase price
including acquisition costs was $1,835. In addition, the Company recorded costs of vacating a leased facility of Aptix of $58. The excess of tangible assets acquired over liabilities assumed was $92. The cost of the acquisition was allocated on the
basis of the estimated fair value of assets acquired and liabilities assumed. The purchase accounting allocations resulted in a charge for in-process R&D of $170, goodwill of $251, technology of $780 and other identified intangible assets of
$600. The technology is being amortized to cost of revenues over two years and other identified intangible assets are being amortized to operating expenses over three years.

In May 2005, the Company acquired Volcano Communications Technologies AB (Volcano), a provider of network design tools, in vehicle software and test and validation products for the automotive industry. The acquisition
was an investment aimed at expanding the Companys product offering within this specialized industry and driving revenue growth. The total purchase price including acquisition costs was $23,155. In addition, the Company recorded severance costs
related to Volcano employees of $84, the majority of which was paid during the second half of 2005. Severance costs affected 5 employees who were terminated due to the overlap of employee skill sets as a result of the



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acquisition. The excess of tangible assets acquired over liabilities assumed was $4,985. The cost of the acquisition was allocated on the basis of the
estimated fair value of assets acquired and liabilities assumed. The purchase accounting allocations resulted in a charge for in-process R&D of $580, goodwill of $10,942, technology of $2,450, and other identified intangible assets of $4,800,
net of related deferred tax liability of $2,030. The technology is being amortized to cost of revenues over four years and other identified intangible assets is being amortized to operating expenses over five years. Of the $4,800 of other identified
intangible assets, $3,700 is being amortized to operating expenses over five years and $1,100 is being amortized to operating expenses over two years.

The
separate results of operations for the acquisitions during the six months ended June 30, 2006 and 2005 were not material compared to the Companys overall results of operations and accordingly pro forma financial statements of the combined
entities have been omitted. The results of operations are included in the Companys consolidated financial statements from the date of acquisition forward.

Other Income, Net

Other income, net totaled $5,403 and $9,035 for the three and six months ended June 30, 2006, respectively,
compared to other income, net of $2,842 and $6,457 for the comparable periods in 2005. Other income, net includes interest income of $5,775 and $10,984 for the three and six months ended June 30, 2006, respectively, compared to $3,098 and
$5,861 for the comparable periods of 2005. Interest income includes amortization of the interest component on the Companys term license installment agreements of $3,621 and $6,933 for the three and six months ended June 30, 2006,
respectively, compared to $1,994 and $3,976 for the comparable periods of 2005. The increase in interest income related to term license installment agreements was attributable to the increase in the average interest rates applied in determining the
interest component for the outstanding term agreements during the applicable periods and the acceleration of the unamortized interest component of term receivables which were sold on a non-recourse basis during the three and six months ended
June 30, 2006. Interest income also includes $1,302 and $2,623 for the three and six months ended June 30, 2006, respectively, and $533 and $899 for the comparable periods in 2005, respectively, for interest earned on the Companys
cash, cash equivalents, and short-term investments. The increase is the result of an increase in the average effective interest rates earned on the Companys short-term investments as well as to an increase in cash, cash equivalents, and
short-term investments. Other income, net also included income relating to time value of foreign currency contracts of $852 and $1,428 for the three and six months ended June 30, 2006, compared to $571 and $986 for the comparable periods in
2005. Other income, net was impacted by a foreign currency loss of $145 and $591 for the three and six months ended June 30, 2006 compared to a gain of $20 and $43 for the comparable periods of 2005. In addition, the Company determined that
certain of its derivative instruments did not meet the criteria for hedge accounting treatment under the requirements of SFAS No. 133, Accounting for Derivative Instruments and Hedging Activities, resulting in a net loss of $1,038
for six months ended June 30, 2006. Other income, net in 2005 was favorably impacted by a net gain on the sale of a building of $957 in March 2005.

Interest Expense

Interest expense was $6,758 and $20,465 for the three and six months ended June 30, 2006, compared to $5,638
and $10,669 for the comparable periods in 2005. The increase in interest expense is due largely to the net effect of financing transactions, including the issuance in March 2006 of 6.25% Convertible Subordinated Debentures due 2026 (6.25%
Debentures), the retirement in March 2006 of 6 7/8% Convertible Subordinated Notes due 2007 (Notes), and the retirement in March and June 2006 of portions of Floating Rate Convertible Subordinated Debentures due 2023 (Floating Rate Debentures), as
more fully described in Liquidity and Capital Resources below. Expenses recorded as interest expense related to these financing transactions included $4,716 for the call premium on the Notes partially offset by repurchase discounts in
the first and second quarter of 2006 of $999 and $72, respectively, on the Floating Rate Debentures. In addition, the Company recorded a charge of $106 and $2,260 in the three and six months ended June 30, 2006, respectively, for the write-off
of unamortized deferred debt issuance costs related to the Notes and Floating Rate Debentures. The increase in interest expense in the three and six months ending June 30, 2006 as compared to the comparable periods in 2005 also included
increases of $218 and $1,216, respectively, in debt interest expense, due primarily to interest on the 6.25% Debentures and to higher average interest rates on the Floating Rate Debentures. In addition, the Company recorded (i) net interest
expense of $1,269 and $2,707 during the three and six months ended June 30, 2006, respectively, compared to $5 and $77 during the comparable periods in 2005 relating to the sale of trade and long-term term receivables as discussed in
Liquidity and Capital Resources, below and (ii) interest expense relating to the time value of foreign currency contracts of $438 and $1,118 for the three and six months ended June 30, 2006, respectively, compared to $362 and
$563 in the comparable periods in 2005.



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Provision for Income Taxes

The provision for income taxes was $205 for the three months ending June 30, 2006 and the benefit from income taxes was $4,983 for the six months ended June 30, 2006 compared to the benefit from income taxes
of $12,239 and $12,319 for the comparable periods of 2005. Generally, the provision for income taxes is the result of the mix of profits (losses) earned by the Company and its subsidiaries in tax jurisdictions with a broad range of income tax rates.
On a quarterly basis, the Company evaluates its provision for income taxes based on its projected results of operations for the full year and records an adjustment in the current quarter. Despite the pre-tax loss in the first six months of 2006, the
Company is projecting pre-tax income for the year. Accordingly, the Company has applied the estimated 43% annual effective tax rate to the pre-tax loss without discrete items for the six months ended June 30, 2006. The actual tax rate of the
resulting tax benefit for the six months ended June 30, 2006 was 44% rather than the estimated 43% annual effective tax rate due to the insignificant impact of discrete items in the quarter. The effective tax rate for the remainder of 2006
could change significantly if actual results are different than current outlook-based projections. The projected provision for income taxes for 2006 at a 43% effective tax rate differs from tax computed at the federal statutory rate primarily due to
(i) United States losses for which no benefit is expected to be realized, and (ii) an increase in foreign tax reserves, offset in part by (iii) the benefit of lower tax rates on earnings of foreign subsidiaries.

The Company has not provided for United States income taxes on the undistributed earnings of foreign subsidiaries because they are considered permanently invested
outside of the United States. If repatriated, some of these earnings would generate foreign tax credits, which may reduce the federal tax liability associated with any future foreign dividend.

Under SFAS No. 109, Accounting for Income Taxes (SFAS No. 109), deferred tax assets and liabilities are determined based on differences between
financial reporting and tax basis of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. SFAS No. 109 provides for the recognition of deferred tax
assets without a valuation allowance if realization of such assets is more likely than not.

In 2004, the Company determined it was uncertain whether the
Companys United States entities would generate sufficient taxable income and foreign source income to utilize foreign tax credit carryforwards, research and experimentation credit carryforwards and net operating loss carryforwards before
expiration. Accordingly, the Company recorded valuation allowances in 2004 and 2005 against the portion of those deferred tax assets for which realization is uncertain. The Company expects to continue applying valuation allowances in 2006,
consistent with the prior two years. A portion of the valuation allowance for deferred tax assets relates to the difference between financial and tax reporting of employee stock option exercises, for which subsequently recognized tax benefits would
be applied directly to increase contributed capital. A portion of the valuation allowance for deferred tax assets relates to certain of the tax attributes acquired from IKOS Systems, Inc. and 0-In Design Automation, Inc., for which subsequently
recognized tax benefits will be applied directly to reduce goodwill. The remainder of the valuation allowance was based on the historical earnings patterns within individual taxing jurisdictions that make it uncertain that the Company will have
sufficient income in the appropriate jurisdictions to realize the full value of the assets. The Company will continue to evaluate the realizability of the deferred tax assets on a quarterly basis.

The Company has reserves for taxes to address potential exposures involving tax positions that could be challenged by taxing authorities, even though the Company
believes that the positions it has taken are appropriate. The tax reserves are reviewed as circumstances warrant and adjusted as events occur that affect the Companys potential liability for additional taxes. The Company is subject to income
taxes in the United States and in numerous foreign jurisdictions and in the ordinary course of business, there are many transactions and calculations where the ultimate tax determination is uncertain.

The Company is currently under examination in various jurisdictions, including the United States and the United Kingdom. The examinations are in different stages of
development and timing of resolution is difficult to predict. The examination in the United States by the IRS pertains to the Companys 2002 and 2003 tax years. While it is often difficult to predict the final outcome or timing of resolution of
any particular tax matter, the Company believes its tax reserves are adequate to cover potential liabilities that could result from the current examinations.

Effects of Foreign Currency Fluctuations

More than half of the Companys revenues and approximately one-third of its expenses
were generated outside of the United States for the first six months of 2006. For 2006 and 2005, approximately one-fourth of European and all Japanese revenues were subject to exchange rate fluctuations as they were booked in local currencies. Most
large European revenue contracts are denominated and paid to the Company in the United States dollar while the Companys European expenses, including substantial research and development operations, are paid inlocal



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currencies causing a short position in the Euro and the British pound sterling. In addition, the Company experiences greater inflows than outflows of
Japanese yen as all Japanese-based customers contract and pay the Company in local currency. While these exposures are aggregated on a consolidated basis to take advantage of natural offsets, substantial exposure remains. For exposures that are not
offset, the Company enters into short-term foreign currency forward and option contracts to partially offset these anticipated exposures. The option contracts are generally entered into at contract strike rates that are different than current market
rates. As a result, any unfavorable currency movements below the strike rates will not be offset by the foreign currency option contract and could negatively affect operating results. These contracts address anticipated future cash flows for periods
up to one year and do not hedge 100% of the potential exposures related to these currencies. As a result, the effects of currency fluctuations could have a substantial effect on the Companys overall results of operations.

Foreign currency translation adjustment, a component of accumulated other comprehensive income reported in the stockholders equity section of the consolidated
balance sheets, increased to $25,833 at June 30, 2006 from $21,324 at December 31, 2005. This reflects the increase in the value of net assets denominated in foreign currencies as a result of the weakening of the United States dollar since
December 31, 2005.

LIQUIDITY AND CAPITAL RESOURCES

Cash, Cash Equivalents and Short-Term Investments

Total cash, cash equivalents and short-term investments at June 30, 2006 were
$136,332 compared to $114,410 at December 31, 2005. Cash provided by operating activities was $46,215 for the six months ended June 30, 2006 compared to $15,449 for the comparable period in 2005. The increase in cash flows from operating
activities was primarily due to (i) an increase in the proceeds from the sale of trade and term receivables as described below, (ii) a decrease in loss before income taxes over the comparable period in 2005, (iii) a smaller decrease
in accounts payable and accrued liabilities in the first six months of 2006 compared to the comparable period in 2005, and (iv) a decrease in prepaid expense and other in the first six months of 2006 compared to an increase in the same period
in 2005. The increase in cash flows from operating activities was partially offset by a smaller increase in deferred revenue in the first six months of 2006 compared to the same period in 2005.

The Company has entered into agreements to sell qualifying accounts receivable from time to time to certain financing institutions on a non-recourse basis. During the
six months ended June 30, 2006, the Company sold trade and term receivables in the amounts of $13,929 and $18,715, respectively, for net proceeds of $30,008. During the six months ended June 30, 2005, the Company sold $14,032 of trade
receivables for net proceeds of $13,955.

Excluding short-term investments, cash used in investing activities was $17,507 in the first six months of 2006
compared to cash used by investing activities of $26,000 in the same period in 2005. Cash used for investing activities in the first six months of 2006 consisted of cash paid for the acquisition of businesses and equity interests of $4,820,
including payments of earnouts and transaction costs related to prior-year acquisitions of $1,503, and capital expenditures of $12,494. Cash used for investing activities for the comparable period in 2005 included capital expenditures of $12,610 and
cash paid for acquisitions of $23,121, partially offset by net proceeds of $9,731 from the sale of a property.

Cash used in financing activities was
$7,325 for the six months ended June 30, 2006, compared to cash provided by financing activities of $6,174 for the comparable period in 2005. As more fully discussed below, in March 2006, the Company issued $200,000 of 6.25% Convertible
Subordinated Debentures due 2026 in a private offering for net proceeds of $194,250. Also in March 2006, the Company used the net proceeds as well as $14,317 from its cash balances to repurchase and retire $171,500 of the Companys 6 7/8%
Convertible Subordinated Notes due 2027 (6 7/8% Notes) and $33,350 of the Companys Floating Rate Convertible Subordinated Debentures due 2023 (Floating Rate Debentures). In June 2006, the Company repurchased and retired an additional $4,800 of
the Floating Rate Debentures. Financing cash flows were positively impacted by proceeds from issuance of common stock upon exercise of stock options and employee stock plan purchases of $9,357 and $9,698 during the six months ended June 30,
2006 and 2005, respectively.

Trade Accounts Receivable, Net

Trade accounts receivable, net decreased to $233,361 at June 30, 2006 from $234,866 at December 31, 2005. Excluding the current portion of term receivables of $132,003 and $133,273, respectively, average
days sales outstanding were 51 days and 41 days at June 30, 2006 and December 31, 2005, respectively. Average days sales outstanding in total accounts receivable increased to 118 days at June 30, 2006 from 96 days at December 31,
2005. The increase in days sales outstanding was primarily due to the decrease in revenue for the three months ended June 30, 2006 as



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compared to the three months ended December 31, 2005. In the quarters where term contract revenue is recorded, only the first twelve months of the
receivable is reflected in current trade accounts receivable. In the following quarters, the amount due in the next twelve months is reflected in current trade accounts receivable without the corresponding revenue.

Prepaid Expenses and Other

Prepaid expenses and other
increased to $16,529 at June 30, 2006 from $15,562 at December 31, 2005. The increase was primarily due to prepayments of employee benefits and sales commissions and to the payment of underwriting fees and related debt costs incurred in
connection with the issuance of the 6.25% Debentures. The increase was partially offset by the write-off of unamortized deferred debt issuance costs in connection with the retirement of the 6 7/8% Notes and a portion of the Floating Rate Debentures,
as more fully discussed below.

Term Receivables, Long-Term

Term receivables, long-term decreased to $120,912 at June 30, 2006 from $131,676 at December 31, 2005. The balances were attributable to multi-year, multi-element term license sales agreements. Balances
under term agreements that are due within one year are included in trade accounts receivable and balances that are due in more than one year are included in term receivables, long-term. The Company uses term agreements as a standard business
practice and has a history of successfully collecting under the original payment terms without making concessions on payments, products or services. The decrease from 2005 was due primarily to the sale of term receivables as described above, as
well as to seasonally lower quarterly average term license revenue since the fourth quarter of 2005 whereby the scheduled run-off of long-term receivables was less than offset by new term license transactions.

Property, Plant and Equipment, net

Property, plant and
equipment, net decreased to $81,099 at June 30, 2006 from $81,374 at December 31, 2005. The decrease was due primarily to depreciation of property, plant and equipment, largely offset by normal quarterly capital purchases.

Accrued Payroll and Related Liabilities

Accrued payroll and
related liabilities decreased to $72,040 at June 30, 2006 from $73,244 at December 31, 2005. The decrease was primarily due to (i) payments of the 2005 annual and fourth quarter incentive bonus compensation in the first quarter of
2006 and (ii) a decrease in accrued sales commissions as a result of seasonally lower commissionable revenue for the six months ended June 30, 2006. The decrease was partially offset by the impact of the timing of payment of sales
commissions earned on commissionable revenue for the first six months of 2006.

Deferred Revenue

Deferred revenue consists primarily of prepaid annual software maintenance services. Deferred revenue increased to $123,897 at June 30, 2006 from $106,453 at
December 31, 2005. The increase was primarily due to annual support contract renewals as well as to a large three-year term transaction in the second quarter of 2006, partially offset by normal amortization of prepayments on existing contracts.

Capital Resources

Expenditures for property,
plant and equipment decreased to $12,494 for the six months ended June 30, 2006 compared to $12,610 for the comparable period of 2005. Expenditures for property, plant and equipment in the six months ended June 30, 2006 and 2005 did not
include any individually significant projects. In the six months ended June 30, 2006, the Company acquired EverCAD, which resulted in net cash payments of $3,317. Additionally, the Company paid $1,503 related to earnouts, transaction costs and
other costs related to prior years acquisitions. In the six months ended June 30, 2005, the Company acquired (i) Volcano and (ii) Aptix, which together resulted in a total net cash payment of $19,671. The Company paid $3,450 in
the first six months of 2005 related to earnouts, holdbacks and transaction costs on prior year acquisitions.

In March 2006, the Company issued $200,000
of 6.25% Convertible Subordinated Debentures due 2026 (6.25% Debentures) in a private offering pursuant to Securities Act Rule 144A. Also in March 2006, the Company used the net proceeds of $194,250 from the sale of the 6.25% Debentures plus $14,317
from its cash balances to retire the 6 7/8% Convertible Subordinated Notes due 2007 and to retire a portion of the Floating Rate Convertible Subordinated Debentures due 2023. The 6.25% Debentures have been registered with the SEC for resale under
the Securities Act of 1933. Interest on the 6.25% Debentures is payable semi-annually in March and September. The 6.25% Debentures are convertible, under certain circumstances, into the Companys common stock at a conversion price of $17.968
per share for a total of 11,131 shares. These circumstances generally include (a) the market price of



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the Companys common stock exceeding 120% of the conversion price, (b) the market price of the 6.25% Debentures declining to less than 98% of the
value of the common stock into which the 6.25% Debentures are convertible, (c) a call for the redemption of the 6.25% Debentures, (d) specified distributions to holders of the Companys common stock, (e) if a fundamental change,
such as a change of control, occurs or (f) during the ten trading days prior to, but not on, the maturity date. Upon conversion, in lieu of shares of the Companys common stock, for each $1,000 principal amount of 6.25% Debentures a holder
will receive an amount of cash equal to the lesser of (i) $1,000 or (ii) the conversion value of the number of shares of the Companys common stock equal to the conversion rate. If such conversion value exceeds $1,000, the Company
will also deliver, at the Companys election, cash or common stock or a combination of cash and common stock with a value equal to the excess. If a holder elects to convert its 6.25% Debentures in connection with a fundamental change of the
Company that occurs prior to March 6, 2011, the holder will also be entitled to receive a make whole premium upon conversion in some circumstances. The 6.25% Debentures rank pari passu with the Floating Rate Debentures. Some or all of the 6.25%
Debentures may be redeemed by the Company for cash on or after March 6, 2011. Some or all of the 6.25% Debentures may be redeemed at the option of the holder for cash on March 1, 2013, 2016 or 2021.

In August 2003, the Company issued $110,000 of Floating Rate Convertible Subordinated Debentures due 2023 (Floating Rate Debentures) in a private offering pursuant to
SEC Rule 144A. The Floating Rate Debentures have been registered with the SEC for resale under the Securities Act of 1933. Interest on the Floating Rate Debentures is payable quarterly in February, May, August and November, at a variable interest
rate equal to 3-month LIBOR plus 1.65%. The effective interest rate was 6.37% and 4.44% for the six months ended June 30, 2006 and 2005, respectively. The Floating Rate Debentures are convertible, under certain circumstances, into the
Companys common stock at a conversion price of $23.40 per share, for a total of 3,071 shares as of June 30, 2006. These circumstances generally include (i) the market price of the Companys common stock exceeding 120% of the
conversion price, (ii) the market price of the Floating Rate Debentures declining to less than 98% of the value of the common stock into which the Floating Rate Debentures are convertible or (iii) a call for redemption of the Floating Rate
Debentures or certain other corporate transactions. The conversion price may be adjusted based on certain future transactions, such as stock splits or stock dividends. Some or all of the Floating Rate Debentures may be redeemed by the Company for
cash on or after August 6, 2007. Some or all of the Floating Rate Debentures may be redeemed at the option of the holder for cash on August 6, 2010, 2013 or 2018. During the first six months of 2006, the Company purchased on the open
market and retired Floating Rate Debentures with a principal balance of $38,150 for a total purchase price of $37,079. As a result, a principal amount of $71,850 remains outstanding. In connection with these purchases, the Company incurred a before
tax net gain on the early extinguishment of debt of $177, which included a $1,071 discount on the repurchased Floating Rate Debentures partially offset by the write-off of $894 of unamortized deferred debt issuance costs.

In March 2006, the Company used a portion of the proceeds from the issuance of the 6.25% Debentures to retire the outstanding balance of $171,500 of the 6 7/8%
Convertible Subordinated Notes (Notes) due 2007. In connection with this retirement, the Company incurred before tax expenses for the early extinguishment of debt of $6,082. Expenses included $4,716 for the call premium on the Notes and $1,366 for
the write-off of unamortized deferred debt issuance costs.

The Company may elect to purchase or otherwise retire some or all of its Debentures with cash,
stock, or other assets from time to time in open market or privately negotiated transactions, either directly or through intermediaries, or by tender offer when the Company believes that market conditions are favorable to do so. Such purchases may
have a material effect on the Companys liquidity, financial condition and results of operations.

In June 2005, the Company entered into a
syndicated, senior, unsecured revolving credit facility that replaced an existing three-year revolving credit facility. Borrowings under the facility are permitted to a maximum of $120,000. This facility is a four-year revolving credit facility,
which terminates on June 1, 2009. Under this facility, the Company has the option to pay interest based on LIBOR with varying maturities which are commensurate with the borrowing period selected by the Company, plus a spread of between 1.0% and
1.6% or prime plus a spread of between 0.0% and 0.6%, based on a pricing grid tied to a financial covenant. In addition, commitment fees are payable on the unused portion of the credit facility at rates between 0.25% and 0.35% based on a pricing
grid tied to a financial covenant. The facility contains certain financial and other covenants, including financial covenants requiring the maintenance of specified liquidity ratios, leverage ratios and minimum tangible net worth. The Company had no
borrowings during 2006 and 2005 against this credit facility or against the previous credit facility and had no balance outstanding at June 30, 2006 or December 31, 2005.



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The Companys primary ongoing cash requirements will be for product development, operating activities, capital
expenditures, debt service and acquisition opportunities that may arise. The Companys primary sources of liquidity are cash generated from operations and borrowings under the revolving credit facility. The Company anticipates that current cash
balances, anticipated cash flows from operating activities, including the effects of financing customer term receivables, amounts available under existing credit facilities, or other available financing sources, such as the issuance of debt or
equity securities, will be sufficient to meet its working capital needs on a short-term and long-term basis. The Companys sources of liquidity could be adversely affected by a decrease in demand for the Companys products or a
deterioration of the Companys financial ratios.

Off-Balance Sheet Arrangements

The Company does not have off-balance sheet arrangements, financings or other relationships with unconsolidated entities or other persons, also known as special purpose
entities. In the ordinary course of business, the Company leases certain real properties, primarily field office facilities, and equipment.

In February
2004, the Company purchased a 10% interest in M2000, a French company. The Company assessed its interest in this variable interest entity and concluded it should not consolidate that entity based on guidance included in FASB Interpretation
No. 46R, Consolidation of Variable Interest Entities. Accordingly, the Company has accounted for this variable interest entity pursuant to the cost method for investments in equity securities that do not have readily determinable
fair values.

Outlook for 2006

Revenues for the
third quarter of 2006 are expected to be approximately $180,000, while loss per share for the same period is expected to be approximately $0.01. Revenues for the year ended December 31, 2006 are expected to be approximately $763,000 and
earnings per share is expected to be approximately $0.19.



|Item 3. | Quantitative And Qualitative Disclosures About Market Risk
|------- | ----------------------------------------------------------

(All
numerical references in thousands, except for rates and percentages)

INTEREST RATE RISK

The Company is exposed to interest rate risk primarily through its investment portfolio, short-term borrowings and long-term notes payable. The Company does not use
derivative financial instruments for speculative or trading purposes.

The Company places its investments in instruments that meet high credit quality
standards, as specified in the Companys investment policy. The policy also limits the amount of credit exposure to any one issuer and type of instrument. The Company does not expect any material loss with respect to its investment portfolio.

The table below presents the carrying value and related weighted-average fixed interest rates for the Companys investment portfolio. The carrying
value approximates fair value at June 30, 2006. In accordance with the Companys investment policy, all investments mature in twelve months or less.



|                                                                                            |  |                 |         |                             |      |  
|------------------------------------------------------------------------------------------- |  | --------------- | ------- | --------------------------- | ---- | -
|Principal (notional) amounts in United States dollars (In thousands, except interest rates) |  | Carrying Amount |         | Average Fixed Interest Rate |     
|Cash equivalents  fixed rate                                                               |  | $               | 35,853  |                             | 5.14 | %
|Short-term investments  fixed rate                                                         |  |                 | 72,731  |                             | 5.12 | %
|                                                                                            |  |                 |         |                             |      |  
|Total fixed rate interest bearing instruments                                               |  | $               | 108,584 |                             | 5.13 | %
|                                                                                            |  |                 |         |                             |      |  

The Company had convertible subordinated debentures of $200,000 outstanding with a fixed interest rate of 6.25% at
June 30, 2006. For fixed rate debt, interest rate changes affect the fair value of the debentures but do not affect earnings or cash flow.

The
Company had floating rate convertible subordinated debentures of $71,850 outstanding with a variable interest rate of 3-month LIBOR plus 1.65% at June 30, 2006. For variable interest rate debt, interest rate changes affect



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earnings and cash flow. If the interest rates on the variable rate borrowings were to increase or decrease by 1% for the year and the level of borrowings
outstanding remained constant, annual interest expense would increase or decrease by approximately $718.

At June 30, 2006, the Company had a
syndicated, senior, unsecured revolving credit facility. Borrowings under the facility are permitted to a maximum of $120,000. The facility is a four-year revolving credit facility which terminates on June 1, 2009. Under this facility, the
Company has the option to pay interest based on LIBOR with varying maturities which are commensurate with the borrowing period selected by the Company, plus a spread of between 1.0% and 1.6% or prime plus a spread of between 0.0% and 0.6%, based on
a pricing grid tied to a financial covenant. As a result, the Companys interest expense associated with borrowings under this credit facility will vary with market interest rates. In addition, commitment fees are payable on the unused portion
of the credit facility at rates between 0.25% and 0.35% based on a pricing grid tied to a financial covenant. The Company had no borrowings during 2006 and 2005 against this credit facility or against the previous credit facility and had no balance
outstanding at June 30, 2006 and December 31, 2005, respectively.

The Company had other long-term notes payable of $5 and short-term borrowings
of $6,401 outstanding at June 30, 2006 with variable rates based on market indexes. For variable rate debt, interest rate changes generally do not affect the fair market value, but do affect future earnings or cash flow. If the interest rates
on the variable rate borrowings were to increase or decrease by 1% for the year and the level of borrowings outstanding remained constant, annual interest expense would increase or decrease by approximately $64.

FOREIGN CURRENCY RISK

The Company transacts business in
various foreign currencies and has established a foreign currency hedging program to hedge certain foreign currency forecasted transactions and exposures from existing assets and liabilities. Derivative instruments held by the Company consist of
foreign currency forward and option contracts. The Company enters into contracts with counterparties who are major financial institutions and believes the risk related to default is remote. The Company does not hold or issue derivative financial
instruments for trading purposes.

The Company enters into foreign currency option contracts for forecasted revenues and expenses between its foreign
subsidiaries. These instruments provide the Company the right to sell/purchase foreign currencies to/from third parties at future dates with fixed exchange rates. As of June 30, 2006, the Company had options outstanding to sell Japanese yen
with contract values totaling $32,087 at a weighted average contract rate of 120.00, to buy the Euro with contract values totaling $27,652 at a weighted average contract rate of 1.20 and to buy the British pound with contract values totaling $12,748
at a weighted average contract rate of 1.83.

The Company enters into foreign currency forward contracts to protect against currency exchange risk
associated with expected future cash flows and existing assets and liabilities. The Companys practice is to hedge a majority of its existing material foreign currency transaction exposures.

The table provides information as of June 30, 2006 about the Companys foreign currency forward contracts. The information provided is in United States dollar
equivalent amounts. The table presents the notional amounts, at contract exchange rates, and the weighted average contractual foreign currency exchange rates. These contracts mature in 2006.



|                   |  |                 |         |                               |        |                   |    
|------------------ |  | --------------- | ------- | ----------------------------- | ------ | ----------------- | ---
|                   |  | Notional Amount |         | WeightedAverage Contract Rate |        | Contract Currency
|Forward Contracts: |  |                 |         |                               |        |                   |    
|Euro               |  | $               | 69,302  |                               | 1.24   |                   | USD
|Japanese Yen       |  |                 | 68,969  |                               | 114.59 |                   | JPY
|British Pound      |  |                 | 21,190  |                               | 1.79   |                   | USD
|Indian Rupee       |  |                 | 4,384   |                               | 45.98  |                   | INR
|Taiwan Dollar      |  |                 | 3,341   |                               | 32.54  |                   | TWD
|Israeli Shekel     |  |                 | 1,690   |                               | 4.45   |                   | ILS
|Swiss Franc        |  |                 | 1,489   |                               | 1.23   |                   | CHF
|Canadian Dollar    |  |                 | 1,365   |                               | 1.10   |                   | CAD
|Other              |  |                 | 4,381   |                               |       |                   |    
|                   |  |                 |         |                               |        |                   |    
|Total              |  | $               | 176,111 |                               |        |                   |    
|                   |  |                 |         |                               |        |                   |    



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|Item 4. | Controls and Procedures
|------- | -----------------------

(1) Evaluation of Disclosure Controls
and Procedures

The Company maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in the
Companys Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the SECs rules and forms, and that such information is accumulated and communicated to the Companys management,
including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls
and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of
possible controls and procedures.

The Company carried out an evaluation, under the supervision and with the participation of the Companys
management, including the Companys Chief Executive Officer and the Companys Chief Financial Officer, of the effectiveness of the design and operation of the Companys disclosure controls and procedures as of the end of the period
covered by this report. Based on the foregoing, the Companys Chief Executive Officer and Chief Financial Officer concluded that the Companys disclosure controls and procedures were effective at the reasonable assurance level as of the
end of the period covered by this report.

(2) Changes in Internal Controls Over Financial Reporting

There has been no change in the Companys internal control over financial reporting that occurred during the last fiscal quarter that has materially affected, or is
reasonably likely to materially affect, the Companys internal control over financial reporting.



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PART II. OTHER INFORMATION



|Item 1A. | Risk Factors
|-------- | ------------

The forward-looking statements contained under
Outlook for 2006 in Item 2, Managements Discussion and Analysis of Financial Condition and Results of Operations, and all other statements contained in this report that are not statements of historical fact,
including without limitation, statements containing the words believes, expects, projections and words of similar meaning, constitute forward-looking statements that involve a number of risks and uncertainties
that are difficult to predict. Moreover, from time to time, we may issue other forward-looking statements. Forward-looking statements regarding financial performance in future periods, including the statements under Outlook for 2006, do
not reflect potential impacts of mergers or acquisitions or other significant transactions or events that have not been announced as of the time the statements are made. Actual outcomes and results may differ materially from what is expressed or
forecast in forward-looking statements. We disclaim any obligation to update forward-looking statements to reflect future events or revised expectations. The following discussion highlights factors that could cause actual results to differ
materially from the results expressed or implied by our forward-looking statements. Forward-looking statements should be considered in light of these factors.

Weakness in the United States and international economies may materially adversely impact us.

The United States and international economies
can experience economic downturns, which may have a material adverse affect on our results of operations. Weakness in these economies may materially adversely impact the timing and receipt of orders for our products and our results of operations.
Revenue levels are dependent on the level of technology capital spending, which includes worldwide expenditures for EDA software, hardware and consulting services. In addition, mergers and company restructurings in the worldwide electronics industry
may materially adversely impact demand for our products and services resulting in decreased or delayed capital spending patterns.

We are subject to the
cyclical nature of the integrated circuit and electronics systems industries and any future downturns may materially adversely impact us.

Purchases of
our products and services are highly dependent upon new design projects initiated by customers in the integrated circuit (IC) and electronics systems industries. These industries are highly cyclical and are subject to constant and rapid
technological change, rapid product obsolescence, price erosion, evolving standards, short product life cycles and wide fluctuations in product supply and demand. The IC and electronics systems industries regularly experience significant downturns,
often connected with, or in anticipation of, maturing product cycles within such companies and/or a decline in general economic conditions. These downturns cause diminished product demand, production overcapacity, high inventory levels and
accelerated erosion of average selling prices. During such downturns, the number of new design projects generally decreases, which can materially adversely impact demand for our products and services.

Our forecasts of our revenues and earnings outlook may be inaccurate and could materially adversely impact our business or our planned results of operations.

Our revenues, particularly new software license revenues, are difficult to forecast. We use a pipeline system, a common industry practice,
to forecast revenues and trends in our business. Sales personnel monitor the status of potential business and estimate when a customer will make a purchase decision, the dollar amount of the sale and the products or services to be sold. These
estimates are aggregated periodically to generate a sales pipeline. Our pipeline estimates may prove to be unreliable either in a particular quarter or over a longer period of time, in part because the conversion rate of the pipeline
into contracts can be very difficult to estimate and requires management judgment. A variation in the conversion rate could cause us to plan or budget incorrectly and materially adversely impact our business or our planned results of operations. In
particular, a slowdown in customer spending or weak economic conditions generally can reduce the conversion rate in a particular quarter as purchasing decisions are delayed, reduced in amount or cancelled. The conversion rate can also be affected by
the tendency of some of our customers to wait until the end of a quarter in the hope of obtaining more favorable terms.



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Fluctuations in quarterly results of operations due to customer seasonal purchasing patterns, the timing of
significant orders and the mix of licenses used to sell our products could materially adversely impact our business and the market price of our common stock.

We have experienced, and may continue to experience, varied quarterly operating results. Various factors affect our quarterly operating results and some of these are not within our control, including customer demand and the timing of
significant orders. We experience seasonality in demand for our products, due to the purchasing cycles of our customers, with revenues in the fourth quarter generally being the highest. We receive a majority of our software product revenues from
current quarter order performance, of which a substantial amount is usually booked in the last few weeks of each quarter. A significant portion of our revenues come from multi-million dollar contracts, the timing of the completion of and the terms
of delivery of which can have a material impact on revenue for a given quarter. If we fail to receive expected orders, particularly large orders, our revenues for that quarter could be materially adversely impacted. In such an event, we could fail
to meet investors expectations, which could have a material adverse impact on our stock price.

Our revenues are also affected by the mix of licenses
entered into where we recognize software product revenues as payments become due and payable or ratably over the license term as compared to revenues recognized at the beginning of the license term. We recognize revenues ratably over the license
term when the customer is provided with rights to unspecified or unreleased future products. A shift in the license mix toward increased ratable or due and payable revenue recognition would result in increased deferral of software product revenues
to future periods and would decrease current revenues, resulting in not meeting near-term revenue expectations.

The gross margin on our software products
is greater than that for our hardware products, software support and professional services. Therefore, our gross margin may vary as a result of the mix of products and services sold. Additionally, the gross margin on software products varies year to
year depending on the amount of royalties due to third parties for the mix of products sold. We also have a significant amount of fixed or relatively fixed costs, such as employee costs and purchased technology amortization, and costs which are
committed in advance and can only be adjusted periodically. As a result, a small failure to reach planned revenues would likely have a relativity large negative effect on resulting earnings. If anticipated revenues do not materialize as expected,
our gross margins and operating results would be materially adversely impacted.

Accounting rules governing revenue recognition may change.

The accounting rules governing software revenue recognition have been subject to authoritative interpretations that have generally made it more
difficult to recognize software product revenues at the beginning of the license period. If this trend continues, new and revised standards and interpretations could materially adversely impact our ability to meet revenue expectations.

We may have additional tax liabilities.

We are subject to income
and non-income based taxes, in the United States and numerous foreign jurisdictions. Significant judgment and estimates are required in determining our worldwide provision for income taxes and other tax liabilities. For example, our interim tax
provision expense is based on our expectation of profit and loss by jurisdiction, and if such mix is different from our estimates then our actual tax expense could be materially different. Our tax expense may also be impacted if our
intercompany transactions, which are required to be computed on an arms length basis, are challenged and successfully disputed by the tax authorities. Also, our tax expense could be impacted depending on the applicability of withholding taxes
on term-based licenses in certain jurisdictions. We note that in the ordinary course of our business, there are many transactions and calculations where the ultimate tax determination is uncertain. We are regularly under audit by tax authorities.
Although we believe our tax estimates are reasonable, the final determination of tax audits or tax disputes could be materially different than that which is reflected in our historical income tax provisions and accruals. Based on the results of an
audit or dispute, a material effect on our income tax provision, net income or cash flows in the period or periods for which that



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determination is made could result. Significant corporate events or transactions such as an acquisition or changes in tax law or the interpretation of tax
law may also prospectively affect our tax position.

Our business is subject to evolving corporate governance and public disclosure regulations that
have increased both costs and the risk of noncompliance, which could have a material adverse impact on us.

Because our common stock is publicly traded
on the NASDAQ Stock Market, we are subject to rules and regulations promulgated by a number of governmental and self-regulated organizations, including the SEC, NASDAQ and the Public Company Accounting Oversight Board, which monitors the accounting
practices of public companies. Many of these regulations continue to evolve, making compliance difficult and uncertain. In particular, Section 404 of Sarbanes-Oxley Act of 2002 and related regulations have required us to include a management
assessment of our internal controls over financial reporting and auditor attestation of that assessment in our annual reports. This effort has required, and continues to require, the commitment of significant financial and managerial resources. A
failure to complete a favorable assessment and obtain an auditors attestation could have a material adverse impact on us.

The outcome of Internal
Revenue Service and other tax authorities examinations could have a material adverse affect on us.

The Internal Revenue Service and other tax
authorities regularly examine our income tax returns. Significant judgment is required in determining the provision for income taxes. In determining the adequacy of income taxes, we assess the likelihood of adverse outcomes resulting from the
Internal Revenue Service and other tax authorities examinations. The ultimate outcome of these examinations cannot be predicted with certainty. Should the Internal Revenue Service or other tax authorities assess additional taxes as a result of
examinations, we may be required to record charges to operations that could have a material impact on the results of operations, financial position or cash flows.

Customer payment defaults could materially adversely impact us.

We use fixed-term license agreements as a standard business practice with
customers we believe are credit-worthy. These multi-year, multi-element term license agreements are typically three years in length and have payments spread over the license term. The complexity of these agreements tends to increase the risk
associated with collectibility from customers that can arise for a variety of reasons including ability to pay, product dissatisfaction, disagreements and disputes. If we are unable to collect under any of these multi-million dollar agreements, our
results of operations could be materially adversely impacted. We use these fixed-term license agreements as a standard business practice and have a history of successfully collecting under the original payment terms without making concessions on
payments, products or services. If we no longer had a history of collecting without providing concessions on term agreements, then revenue would be required to be recognized as the payments become due and payable over the license term. This change
would have a material adverse impact on our results.

There are limitations on the effectiveness of controls.

We do not expect that disclosure controls or internal control over financial reporting will prevent all error and all fraud. A control system, no matter how well designed
and operated, can provide only reasonable, not absolute, assurance that the control systems objectives will be met. Further, the design of a control system must reflect the fact that there are resource constraints and the benefits of controls
must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected. Failure of
our control systems to prevent error or fraud could materially adversely impact us.

The lengthy sales cycle for our products and services and delay in
customer consummation of projects, make the timing of our revenues difficult to predict.

We have a lengthy sales cycle that generally extends between
three and six months. A lengthy customer evaluation and approval process is generally required due to the complexity and expense associated with our products and services. Consequently, we may incur substantial expenses and devote significant
management effort and expense to develop potential relationships that do not result in agreements or revenues and may prevent us from pursuing other opportunities. In addition, sales of our products and



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services may be delayed if customers delay approval or commencement of projects due to customers budgetary constraints, internal acceptance review
procedures, timing of budget cycles or timing of competitive evaluation processes.

Any loss of our leadership position in certain segments of the EDA
market could have a material adverse impact on us.

The industry in which we compete is characterized by very strong leadership positions in specific
segments of the EDA market. For example, one company may enjoy a large percentage of sales in the physical verification segment of the market while another will have a similarly strong position in mixed-signal simulation. These strong leadership
positions can be maintained for significant periods of time as the software is difficult to master and customers are disinclined to make changes once their employees, as well as others in the industry, have developed familiarity with a particular
software product. For these reasons, much of our profitability arises from niche areas in which we are the strong leader. Conversely, it is difficult for us to achieve significant profits in niche areas where other companies are the leaders. If for
any reason we lose our leadership position in a niche, we could be materially adversely impacted.

We may not realize revenues as a result of our
investments in research and development.

We incur substantial expense to develop new software products. Research and development activities are often
performed over long periods of time. This effort may not yield a successful product offering or the product may not satisfy customer requirements. As a result, we would realize little or no revenues related to our investment in research and
development.

Intense competition in the EDA industry could materially adversely impact us.

Competition in the EDA industry is intense, which can lead to, among other things, price reductions, longer selling cycles, lower product margins, loss of market share
and additional working capital requirements. If our competitors offer significant discounts on certain products, we may need to lower our prices or offer other favorable terms in order to compete successfully. Any such changes would likely reduce
margins and could materially adversely impact our operating results. Any broad-based changes to our prices and pricing policies could cause new software license and service revenues to decline or be delayed as the sales force implements and our
customers adjust to the new pricing policies. Some of our competitors may bundle software products for promotional purposes or as a long-term pricing strategy. These practices could significantly constrain prices we can charge for our products. Our
success depends upon our ability to acquire or develop and market products and services that are innovative and cost-competitive and that meet customer expectations.

We currently compete primarily with two large companies: Cadence Design Systems, Inc. and Synopsys, Inc. We compete with numerous smaller companies, a number of which have combined with other EDA companies. We also
compete with manufacturers of electronic devices that have developed, or have the capability to develop, their own EDA products internally.

We may
acquire other companies and may not successfully integrate them.

The industry in which we compete has seen significant consolidation in recent years.
During this period, we have acquired numerous businesses and have frequently been in discussions with potential acquisition candidates, and we may acquire other businesses in the future. While we expect to carefully analyze all potential
transactions before committing to them, we cannot assure that any transaction that is completed will result in long-term benefits to us or our shareholders or that our management will be able to manage the acquired businesses effectively. In
addition, growth through acquisition involves a number of risks. If any of the following events occurs after we acquire another business, it could materially adversely impact us:



| |  |  | difficulties in combining previously separate businesses into a single unit;
| | - |  | ----------------------------------------------------------------------------



| |  |  | the substantial diversion of managements attention from day-to-day business when integrating the acquired business;
| | - |  | --------------------------------------------------------------------------------------------------------------------



| |  |  | the discovery after the acquisition has been completed of previously unknown liabilities assumed with the acquired business;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------



| |  |  | the failure to realize anticipated benefits, such as cost savings and increases in revenues;
| | - |  | --------------------------------------------------------------------------------------------



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| |  |  | the failure to retain key personnel of the acquired business;
| | - |  | -------------------------------------------------------------



| |  |  | difficulties related to assimilating the products of an acquired business in, for example, distribution, engineering and customer support areas;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | unanticipated costs;
| | - |  | --------------------



| |  |  | adverse impacts on existing relationships with suppliers and customers; and
| | - |  | ---------------------------------------------------------------------------



| |  |  | failure to understand and compete effectively in markets in which we have limited experience.
| | - |  | ---------------------------------------------------------------------------------------------

Acquired businesses may not perform as projected, which could result in impairment of acquisition-related intangible assets. Additional challenges include integration of sales channels, training and education of the
sales force for new product offerings, integration of product development efforts, integration of systems of internal controls and integration of information systems. Accordingly, in any acquisition there will be uncertainty as to the achievement
and timing of projected synergies, cost savings and sales levels for acquired products. All of these factors can impair our ability to forecast, meet revenues and earnings targets and manage effectively our business for long-term growth. We cannot
assure that we can effectively meet these challenges.

Risks of international operations and the effects of foreign currency fluctuations can materially
adversely impact our business and operating results.

We realize more than half of our revenues from customers outside the United States and we generate
approximately one-third of our expenses outside the United States. Significant changes in exchange rates can have an adverse impact on us. For further discussion of foreign currency effects, see Effects of Foreign Currency Fluctuations
discussion in Part I, Item 2. Managements Discussion and Analysis of Financial Condition and Results of Operations. In addition, international operations subject us to other risks including longer receivables collection
periods, changes in a specific countrys or regions economic or political conditions, trade protection measures, import or export licensing requirements, loss or modification of exemptions for taxes and tariffs, limitations on
repatriation of earnings and difficulties with licensing and protecting our intellectual property rights.

The delay in production of components or the
ordering of excess components for our emulation hardware products could materially adversely impact us.

The success of our emulation product depends on
our ability to procure hardware components on a timely basis from a limited number of suppliers, assemble and ship systems on a timely basis with appropriate quality control, develop distribution and shipment processes, manage inventory and related
obsolescence issues and develop processes to deliver customer support for hardware. Our inability to be successful in any of the foregoing could materially adversely impact us.

We commit to purchase component parts from suppliers based on sales forecasts of our emulation products. If we cannot change or be released from these non-cancelable purchase commitments, and if orders for our
products do not materialize, we could incur significant costs related to the purchase of excess components which could become obsolete before we can use them. Additionally, a delay in production of the components could materially adversely impact
our operating results.

Our failure to adequately protect our proprietary rights or to obtain software or other intellectual property licenses could
materially adversely impact us.

Our success depends, in large part, upon our proprietary technology. We generally rely on patents, copyrights,
trademarks, trade secret laws, licenses and restrictive agreements to establish and protect our proprietary rights in technology and products. Despite precautions we may take to protect our intellectual property, we cannot assure that third parties
will not try to challenge, invalidate or circumvent these protections. The companies in the EDA industry, as well as entities and persons outside the industry, are obtaining patents at a rapid rate. Many of these entities have substantially larger
patent portfolios than we have. As a result, we may on occasion be forced to engage in costly patent litigation to protect our rights or defend our customers rights. We may also need to settle these claims on terms that are unfavorable; such
settlements could result in the payment of significant damages or royalties, or force us to stop selling or redesign one or more products. We cannot assure that the rights granted under our patents will provide us with any competitive advantage,
that patents will be issued on any of our pending applications or that future patents will be sufficiently broad to protect our technology. Furthermore, the laws of foreign countries may



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not protect our proprietary rights in those countries to the same extent as United States law protects these rights in the United States.

Some of our products include software or other intellectual property licensed from third parties, and we may have to seek new licenses or renew existing licenses for
software and other intellectual property in the future. Our failure to obtain software or other intellectual property licenses or rights on favorable terms could materially adversely impact us.

Future litigation may materially adversely impact us.

Any future
litigation may result in injunctions against future product sales and substantial unanticipated legal costs and divert the efforts of management personnel, any and all of which could materially adversely impact us.

We may become subject to unfair hiring claims, which could prevent us from hiring needed employees, incur liability for damages or incur substantial unanticipated
legal costs.

Companies whose employees accept positions with competitors frequently claim that these competitors have engaged in unfair hiring
practices or that the employment of these persons would involve the disclosure or use of confidential information or trade secrets. These claims could prevent us from hiring needed employees. They may result in us incurring liability for damages
and/or substantial unanticipated legal costs. These claims also may divert the efforts of management personnel from our operations.

Errors or defects
in our products and services could expose us to liability and harm our reputation.

Our customers use our products and services in designing and
developing products that involve a high degree of technological complexity and have unique specifications. Due to the complexity of the systems and products with which we work, some of our products and designs can be adequately tested only when put
to full use in the marketplace. As a result, our customers or their end users may discover errors or defects in our software or the systems we design, or the products or systems incorporating our designs and intellectual property may not operate as
expected. Errors or defects could result in:



| |  |  | loss of current customers and loss of, or delay in, revenue and loss of market share;
| | - |  | -------------------------------------------------------------------------------------



| |  |  | failure to attract new customers or achieve market acceptance;
| | - |  | --------------------------------------------------------------



| |  |  | diversion of development resources to resolve the problems resulting from errors or defects; and
| | - |  | ------------------------------------------------------------------------------------------------



| |  |  | increased service costs.
| | - |  | ------------------------

Our failure to attract and retain key
employees may harm us.

We depend on the efforts and abilities of our senior management, our research and development staff and a number of other key
management, sales, support, technical and services personnel. Competition for experienced, high-quality personnel is intense, and we cannot assure that we can continue to recruit and retain such personnel. The failure by us to hire and retain such
personnel would impair our ability to develop new products and manage our business effectively.

Regulations adopted by the NASDAQ Stock Market require
stockholder approval for new stock option plans and significant amendments to existing plans, including increasing the number of options available for grant. These regulations could make it more difficult for us to grant equity compensation to
employees in the future. To the extent that these regulations make it more difficult or expensive to grant equity compensation to employees, we may incur increased compensation costs or find it difficult to attract and retain employees, which could
materially adversely impact us.

Terrorist attacks and other acts of violence or war may materially adversely impact the markets on which our securities
trade, the markets in which we operate, our operations and our profitability.

Terrorist attacks may negatively affect our operations and investment in
our business. These attacks or armed conflicts may directly impact our physical facilities or those of our suppliers or customers. Furthermore, these attacks may make travel more difficult and expensive and ultimately affect our revenues.



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Any armed conflict entered into by the United States could have an adverse impact on our revenues and our ability to
deliver products to our customers. Political and economic instability in some regions of the world may also result from an armed conflict and could negatively impact our business. We currently have operations in Pakistan, Egypt and Israel, countries
that may be particularly susceptible to this risk. The consequences of any armed conflict are unpredictable, and we may not be able to foresee events that could have an adverse impact on us.

More generally, any of these events could cause consumer confidence and spending to decrease or result in increased volatility in the United States and worldwide
financial markets and economy. They also could result in economic recession in the United States or abroad. Any of these occurrences could have a significant impact on our operating results, revenues and costs and may result in volatility of the
market price for our common stock.

Our articles of incorporation, Oregon law and our shareholder rights plan may have anti-takeover effects.

Our board of directors has the authority, without action by the shareholders, to designate and issue up to 1,200,000 shares of incentive stock in one
or more series and to designate the rights, preferences and privileges of each series without any further vote or action by the shareholders. Additionally, the Oregon Control Share Act and the Business Combination Act limit the ability of parties
who acquire a significant amount of voting stock to exercise control over us. These provisions may have the effect of lengthening the time required for a person to acquire control of us through a proxy contest or the election of a majority of the
board of directors. In February 1999, we adopted a shareholder rights plan, which has the effect of making it more difficult for a person to acquire control of us in a transaction not approved by our board of directors. The potential issuance of
incentive stock, the provisions of the Oregon Control Share Act and the Business Combination Act and our shareholder rights plan may have the effect of delaying, deferring or preventing a change of control of us, may discourage bids for our common
stock at a premium over the market price of our common stock and may materially adversely impact the market price of, and the voting and other rights of the holders of, our common stock.

Our debt obligations expose us to risks that could materially adversely impact our business, operating results and financial condition, and could prevent us from fulfilling our obligations under such indebtedness.

We have a substantial level of indebtedness. As of June 30, 2006, we had $281.5 million of outstanding indebtedness, which includes $71.8 million
of Floating Rate Convertible Subordinated Debentures due 2023 (Floating Rate Debentures) and $200 million of 6.25% Convertible Subordinated Debentures due 2026 (6.25% Debentures). This level of indebtedness among other things could:



| |  |  | make it difficult for us to satisfy our payment obligations on our debt;
| | - |  | ------------------------------------------------------------------------



| |  |  | make it difficult for us to incur additional indebtedness or obtain any necessary financing in the future for working capital, capital expenditures, debt service, acquisitions or
general corporate purposes;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | limit our flexibility in planning for or reacting to changes in our business;
| | - |  | -----------------------------------------------------------------------------



| |  |  | reduce funds available for use in our operations;
| | - |  | -------------------------------------------------



| |  |  | make us more vulnerable in the event of a downturn in our business;
| | - |  | -------------------------------------------------------------------



| |  |  | make us more vulnerable in the event of an increase in interest rates if we must incur new debt to satisfy our obligations under the Floating Rate Debentures and 6.25% Debentures;
or
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | place us at a possible competitive disadvantage relative to less leveraged competitors and competitors that have greater access to capital resources.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------

If we experience a decline in revenues due to any of the factors described in this section entitled Risk Factors, we could have difficulty paying amounts due
on our indebtedness. Any default under our indebtedness could have a material adverse impact on our business, operating results and financial condition.



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|Item 4. | Submission of Matters to a Vote of Security Holders
|------- | ---------------------------------------------------

The 2006
Annual Meeting of Shareholders of the Company was held pursuant to notice at 5:00 p.m. Pacific time on May 18, 2006 at the Companys offices in Wilsonville, Oregon to consider and vote upon



|Proposal  1 | To elect directors to serve for the ensuing year and until their successors are elected
|----------- | ---------------------------------------------------------------------------------------

|Proposal  2 | To amend the Companys 1987 Non-Employee Director Stock Option Plan to increase the number of shares reserved for issuance under the plan
|----------- | -----------------------------------------------------------------------------------------------------------------------------------------

|Proposal  3 | To amend the Companys 1989 Employee Stock Purchase Plan to increase the number of shares reserved for issuance under the plan
|----------- | ------------------------------------------------------------------------------------------------------------------------------

|Proposal  4 | To ratify the appointment of KPMG LLP as independent public accountants for the year 2006
|----------- | -----------------------------------------------------------------------------------------

The results of the voting on these proposals were as follows:



|                                 |  |            |  |          
|-------------------------------- |  | ---------- |  | ---------
|Proposal 1 Election of Directors |  | For        |  | Withheld 
|Marsha B. Congdon                |  | 72,500,236 |  | 2,923,528
|Gregory K. Hinckley              |  | 73,401,426 |  | 2,022,338
|Kevin C. McDonough               |  | 74,588,730 |  | 835,034  
|Walden C. Rhines                 |  | 73,378,800 |  | 2,044,964
|Fontaine K. Richardson           |  | 71,579,794 |  | 3,843,970
|Sir Peter Bonfield               |  | 74,265,594 |  | 1,158,170
|James R. Fiebiger                |  | 73,138,982 |  | 2,284,782
|Patrick B. McManus               |  | 74,585,006 |  | 838,758  



|           |  |            |  |            |  |             |  |                 
|---------- |  | ---------- |  | ---------- |  | ----------- |  | ----------------
|           |  | For        |  | Against    |  | Abstentions |  | Broker Non-Votes
|Proposal 2 |  | 43,246,100 |  | 15,834,844 |  | 1,210,771   |  | 15,132,049      
|Proposal 3 |  | 51,822,355 |  | 7,441,116  |  | 1,028,243   |  | 15,132,050      
|Proposal 4 |  | 74,620,851 |  | 471,893    |  | 331,020     |  | 0               



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|Item 6. | Exhibits
|------- | --------



|     |  |                                                                                                                                                                                             
|---- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|4.A. |  | Second Amendment to Credit Agreement dated as of June 20, 2006 between the Company, Bank of America, N.A. as agent and the other lenders.                                                   
|     | 
|31.1 |  | Certification of Chief Executive Officer of Registrant Pursuant to SEC Rule 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                      
|     | 
|31.2 |  | Certification of Chief Financial Officer of Registrant Pursuant to SEC Rule 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                      
|     | 
|32   |  | Certification of Chief Executive Officer and Chief Financial Officer of Registrant Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.



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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be
signed on its behalf by the undersigned thereunto duly authorized.



|                      |  |  |  |                                         
|--------------------- |  |  |  | ----------------------------------------
|Dated: August 8, 2006 |  |  |  | MENTOR GRAPHICS CORPORATION (Registrant)
|                      |  | 
|                      |  |  |  | /S/ GREGORY K. HINCKLEY                 
|                      |  |  |  | Gregory K. Hinckley                     
|                      |  |  |  | President                               



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