<PAGE>
 
                                   FORM 10-Q

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, DC  20549
                                        

(Mark One)

{ X }  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND
       EXCHANGE ACT OF 1934


     For the quarterly period ended              March 31, 1999
                                    ------------------------------------------

                                       OR


{  }   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND
       EXCHANGE ACT OF 1934


For the transition period from                        to
                              ------------------------  ------------------------

Commission File Number                       0-13716
                       ---------------------------------------------------------

                        NORTH PITTSBURGH SYSTEMS, INC.
--------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


         Pennsylvania                                 25-1485389
-----------------------------------     --------------------------------------
  (State or other jurisdiction of        (I.R.S. Employer Identification No.)
  incorporation or organization)

              4008 Gibsonia Road, Gibsonia, Pennsylvania 15044-9311
              -----------------------------------------------------             
                    (Address of principal executive offices)
                                   (Zip Code)

                               724-443-9600
------------------------------------------------------------------------------
              (Registrant's telephone number, including area code)

                                   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 and Exchange Act of 1934
during the preceding 12 months, and (2) has been subject to such filing
requirements for the past 90 days.

                              YES  X       NO
                                 -----       ------     

                      APPLICABLE ONLY TO CORPORATE USERS:

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.

                            Common Stock Outstanding
                            ------------------------

At April 23, 1999, the Registrant had 15,005,000 shares of common stock
outstanding, par value $.15625 per share, the only class of such stock
issued.
<PAGE>
 
                                    PART I
                                    ITEM 1
                              FINANCIAL STATEMENTS
                NORTH PITTSBURGH SYSTEMS, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED)
                    (Thousands -- Except Per Share Amounts)
                                        
<TABLE>
<CAPTION>
 
 
                                                            For the Three Months
                                                               Ended March 31
                                                            --------------------
                                                              1999      1998
                                                            -------   -------
<S>                                                         <C>       <C>
Operating revenues:
  Local network services                                    $ 3,191   $ 2,825
  Long distance and access services                          11,748    10,996
  Directory advertising, billing & other services               695       621
  Telecommunication equipment sales                             608       560
  Other operating revenues                                    1,297     1,094
                                                            -------   -------
 
     Total Operating Revenues                                17,539    16,096
                                                            -------   -------
 
Operating expenses:
  Network and other operating expenses                        7,130     6,216
  Depreciation and amortization                               3,218     2,898
  State and local taxes                                         801       754
  Telecommunication equipment expenses                          607       537
                                                            -------   -------
 
     Total Operating Expenses                                11,756    10,405
                                                            -------   -------
 
  Net Operating Revenues                                      5,783     5,691
 
Other expense (income), net:
  Interest expense                                              510       462
  Interest income                                              (267)     (382)
  Sundry expense (income), net                                 (155)     (904)
                                                            -------   -------
 
                                                                 88      (824)
                                                            -------   -------
 
     Earnings before income taxes                             5,695     6,515
 
  Income taxes                                                2,279     2,264
                                                            -------   -------
 
     Net earnings                                           $ 3,416   $ 4,251
                                                            =======   =======
 
 
Weighted average common shares outstanding                   15,005    15,005
                                                            =======   =======
 
Basic and diluted earnings per share of
common stock                                                   $.23      $.28
                                                            =======   =======
 
Dividends per share of common stock                            $.16      $.15
                                                            =======   =======
 
</TABLE>


     See accompanying notes to condensed consolidated financial statements.

                                       1
<PAGE>
 
                NORTH PITTSBURGH SYSTEMS, INC. AND SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS
                             (Thousands of Dollars)
<TABLE>
<CAPTION>
 
                                                                  Mar. 31       Dec. 31
                        ASSETS                                1999 (Unaudited)    1998
                        ------                                ----------------  --------
<S>                                                           <C>               <C>
Current Assets:
  Cash and temporary investments                                 $ 12,436       $ 16,786      
  Marketable securities available for sale                         15,531         14,670      
                                                                                               
  Accounts receivable:                                                                         
   Customers                                                        3,312          3,599      
   Access service settlements and other                             7,411          7,310      
  Prepaid expenses                                                     37            204      
  Inventories of construction and operating materials and                                      
   supplies                                                         3,920          4,019      
  Prepaid taxes                                                       862              -      
                                                                 --------       --------      
                                                                                               
     Total current assets                                          43,509         46,588      
                                                                 --------       --------      
                                                                                               
  Property, plant and equipment:                                                               
   Land                                                               475            475      
   Buildings                                                       11,115         11,067      
   Equipment                                                      139,018        136,779      
                                                                 --------       --------      
                                                                                               
                                                                  150,608        148,321      
  Less accumulated depreciation and amortization                   81,682         78,854      
                                                                 --------       --------      
                                                                                               
                                                                   68,926         69,467      
  Construction in progress                                         12,036          6,863      
                                                                 --------       --------      
     Total property, plant and equipment, net                      80,962         76,330      
                                                                                               
Investments                                                         9,786          9,637      
Deferred financing costs                                              834            857      
Prepaid pension cost                                                1,077            598      
Other assets                                                        1,029          1,305      
                                                                 --------       --------      
                                                                                               
                                                                 $137,197       $135,315      
                                                                 ========       ========      
                                                                                               
     LIABILITIES AND SHAREHOLDERS' EQUITY                                                      
     ------------------------------------                                  
                                                                                               
Current liabilities:                                                                           
  Current portion of long-term debt                              $  1,864       $  1,850      
  Accounts payable                                                  6,196          6,756      
  Dividend payable                                                  2,401          2,251      
  Other accrued liabilities                                         2,278          2,616      
  Federal and state income taxes                                    2,576            920      
                                                                 --------       --------      
                                                                                               
     Total current liabilities                                     15,315         14,393      
                                                                 --------       --------      
                                                                                               
Long-term debt                                                     31,720         32,196      
                                                                                               
Deferred income taxes                                               8,340          8,060      
Accrued postretirement benefits                                     5,040          5,002      
Other liabilities                                                   1,772          1,858      
                                                                                               
Shareholders' equity:                                                                          
  Capital stock/Common stock                                        2,350          2,350      
  Capital in excess of par value                                    2,215          2,215      
  Retained earnings                                                70,280         69,265      
  Less cost of treasury stock (1999 and 1998-35,000 shares)          (508)          (508)     
  Accumulated other comprehensive income-unrealized gain                                       
   on available for sale securities, net                              673            484      
                                                                 --------       --------      
                                                                                               
     Total shareholders' equity                                    75,010         73,806      
                                                                 --------       --------      
                                                                                               
                                                                 $137,197       $135,315      
                                                                 ========       ========       
</TABLE>
     See accompanying notes to condensed consolidated financial statements.

                                       2
<PAGE>
 
                NORTH PITTSBURGH SYSTEMS, INC. AND SUBSIDIARIES

               CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
                             (Thousands of Dollars)
<TABLE>
<CAPTION>
 
 
                                                                                For the Three Months
                                                                                  Ended Mar. 31
                                                                                --------------------
                                                                                  1999        1998
                                                                                -------     --------
<S>                                                                             <C>         <C>
Cash from operating activities:
  Net earnings                                                                   $ 3,416     $ 4,251
  Adjustments to reconcile net earnings to net cash from
   operating activities:
 
     Depreciation and amortization                                                 3,218       2,898
     Gain on sale of marketable securities                                           (12)         (1)
     Equity (income) losses of affiliated companies                                 (149)       (234)
     Changes in assets and liabilities:
      Accounts receivable                                                            186         250
      Inventories of construction and operating materials
       & supplies                                                                     99         (95)
      Deferred financing costs, prepaid pension cost
       and other assets                                                             (180)        353
      Prepaid federal and state taxes                                               (862)       (755)
      Accounts payable                                                              (560)        751
      Other accrued liabilities                                                     (424)       (205)
      Accrued postretirement benefits                                                 38          62
      Federal and state income taxes                                               1,806       1,776
      Other, net                                                                     185          41
                                                                                 -------     -------
 
          Total adjustments                                                        3,345       4,841
                                                                                 -------     -------
 
          Net cash from operating activities                                       6,761       9,092
                                                                                 -------     -------
 
Cash used for investing activities:
  Expenditures for property and equipment                                         (7,766)     (3,136)
  Net salvage on retirements                                                        (102)        164
                                                                                 -------     -------
 
          Net capital additions                                                   (7,868)     (2,972)
                                                                                 -------     -------
 
  Purchase of marketable securities available for sale                            (2,514)          -
  Proceeds from sale of marketable securities available for sale                   1,984         105
  Proceeds from sale of investment                                                     -      13,561
                                                                                 -------     -------
 
          Net cash used for investing activities                                  (8,398)     10,694
                                                                                 -------     -------
 
Cash used for financing activities:
  Cash dividends                                                                  (2,251)     (2,102)
  Retirement of debt                                                                (462)       (194)
                                                                                 -------     -------
 
          Net cash used for financing activities                                  (2,713)     (2,296)
                                                                                 -------     -------
 
Net (decrease) increase in cash and temporary investments                         (4,350)     17,490
 
Cash and temporary investments at beginning of period                             16,786      15,938
                                                                                 -------     -------
 
Cash and temporary investments at end of period                                  $12,436     $33,428
                                                                                 =======     =======
 
Interest paid                                                                    $   488     $   439
                                                                                 =======     =======
 
Income taxes paid                                                                $   342     $   489
                                                                                 =======     =======
 
</TABLE>

     See accompanying notes to condensed consolidated financial statements.

                                       3
<PAGE>
 
                NORTH PITTSBURGH SYSTEMS, INC. AND SUBSIDIARIES
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                        

(1)  GENERAL
     -------

     The condensed consolidated financial statements included herein have been
     prepared by the Registrant, without audit, pursuant to the rules and
     regulations of the Securities and Exchange Commission. Consolidated herein
     are the financial results of the Registrant's wholly-owned subsidiaries,
     North Pittsburgh Telephone Company (North Pittsburgh), Penn Telecom, Inc.
     (Penn Telecom) and Pinnatech, Inc. (Pinnatech). Certain information and
     footnote disclosures normally included in financial statements prepared in
     accordance with generally accepted accounting principles have been
     condensed or omitted pursuant to such rules and regulations. Nevertheless,
     the Registrant believes that its disclosures herein are adequate to make
     the information presented not misleading and, in the opinion of management,
     all adjustments (which consisted only of normal recurring accruals)
     necessary to present fairly the results of operations for the interim
     periods have been reflected. It is suggested that these condensed
     consolidated financial statements be read in conjunction with the financial
     statements and the notes thereto included in the Registrant's latest annual
     report to the Securities and Exchange Commission on Form 10-K .

(2)  COMPREHENSIVE INCOME
     --------------------

     Statement of Financial Accounting Standards No. 130, "Reporting
     Comprehensive Income" ("SFAS 130"), establishes requirements for disclosure
     of comprehensive income. The objective of SFAS 130 is to report all changes
     in equity that result from transactions and economic events other than
     transactions with owners. Comprehensive income is the total of net income
     and all other non-owner changes in equity. The reconciliation of net income
     to comprehensive income (loss) is as follows (in thousands):

<TABLE>
<CAPTION>
 
                                     For the Three Months
                                         Ended Mar. 31
                                     ---------------------
                                       1999        1998
                                     ---------  ----------
<S>                                  <C>        <C>
 
        Net income                      $3,416     $4,251
        Unrealized gain (loss) on
           marketable securities           189         (2)
                                        ------     ------
 
        Comprehensive income            $3,605     $4,249
                                        ======     ======
 
</TABLE>


                                     ITEM 2

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                                        


1.  Financial Condition
    -------------------

    (a)  General
         -------

    There were no material changes in the Registrant's consolidated general
    financial condition from the end of its preceding fiscal year on December
    31, 1998 to March 31, 1999, the end of the three-month period reported
    herein.

                                       4
<PAGE>
 
     (b) Liquidity and Capital Resources
         -------------------------------

     Consolidated capital expenditure commitments for the purchase and
     installation of communications and other equipment at March 31, 1999
     amounted to approximately  $2,369,000, with such amount being part of the
     1999 construction program, which is expected to be in excess of $20
     million.  Funds for financing construction expenditures in the three-month
     period ended March 31, 1999 were generated from internal sources.  Based on
     its 1999 construction budget and projected cash flows, the Registrant
     anticipates cash flows provided by operating activities and cash reserves
     in 1999 to be sufficient to service long-term debt, to pay dividends and to
     finance approximately 25% to 50% of capital additions.  The balance of
     capital additions will be financed from debt financing available from the
     Rural Utilities Service.  At March 31, 1999, construction work in progress
     was $11,461,000.  An additional $5,393,000 is expected to be expended to
     complete these projects.

     The Registrant and its subsidiaries have not experienced any difficulty in
     the past meeting either long-term or short-term cash commitments.  Cash
     flow generated through regular operations has been adequate to not only
     finance a significant portion of the capital requirements of the Registrant
     as discussed above but also to meet principal and interest payments on
     long-term debt and all working capital requirements.  It is anticipated
     that future long-term interest and principal payments will be made from the
     same source of internally generated funds.

     (c)  Regulatory/Competition
          ----------------------

     North Pittsburgh, under Chapter 30 of the Pennsylvania Public Utility Code,
     filed a petition with the PA PUC, on July 31, 1998, seeking approval of an
     alternative form of regulation to replace traditional rate base/rate of
     return regulation or be subject to a show cause proceeding.  The petition
     also included a proposed network modernization plan.  In the filing, North
     Pittsburgh proposed a price cap plan whereby rates for noncompetitive
     services are allowed to be increased based on an index that measures
     general economy wide price increases.  This petition is still pending
     before the PA PUC and may be modified in the final order.  However, it is
     not possible at this time to determine the PA PUC's disposition of this
     petition or the effect on North Pittsburgh's financial position or results
     of operations.

     The Federal Communications Commission (FCC) continues to work on
     Rulemakings that will further spell out the specifics of the
     Telecommunications Act of 1996 (the 1996 Act).  The PA PUC must then
     finalize its course of action to fully implement the 1996 Act, or to the
     extent possible and permissible, change the manner in which such
     regulations are implemented in Pennsylvania before the impact on North
     Pittsburgh, a Rural Telephone Company under the 1996 Act, can be fully
     understood and measured.  However, the clear intent of the 1996 Act is to
     open up the local exchange market to competition.  The 1996 Act appears to
     mandate, among other items, that North Pittsburgh, at some point in time,
     permit the resale of its services at wholesale rates, provide number
     portability, if feasible, provide dialing parity, provide interconnection
     to any requesting carrier for the transmission and routing of telephone
     exchange service and exchange access and provide access to network
     elements.  The Company joined with 17 other rural companies in Pennsylvania
     to file a petition with the PA PUC requesting a temporary suspension of the
     interconnection requirements of Section 251 of the 1996 Act for a two-year
     period following resolution of the FCC's Universal Service and Access
     Reform Orders.  The Petition was filed February 20, 1997 and the PA PUC
     approved the Petition on July 10, 1997.  This initial two-year suspension
     expires July 10, 1999.  In January, 1999, North Pittsburgh filed for a one-
     year extension of the suspension until July 10, 2000.  A decision by the PA
     PUC is expected in the second quarter of 1999.

                                       5
<PAGE>
 
     The 1996 Act, FCC and PA PUC regulatory proceedings and the thrust towards
     a fully competitive marketplace have created some uncertainty in respect to
     the levels of North Pittsburgh's revenue growth in the future.  However,
     its unique location in a growing commercial/residential suburban traffic
     corridor to the north of the City of Pittsburgh, its state-of-the-art
     switching transmission and transport facilities and its extensive fiber
     network place North Pittsburgh in a solid position to meet competition and
     minimize any loss of revenues.  In addition, North Pittsburgh continues to
     make its network flexible and responsive to the needs of its customers to
     meet competitive threats.  New services, access line growth and anticipated
     usage growth are expected to lessen or offset any reductions in North
     Pittsburgh's revenue sources.

2.   Results of Operations
     ---------------------

     Total operating revenues increased $1,443,000 (9.0%) in the three-month
     period ended March 31, 1999 over the comparable period in 1998.  This
     change was due to an increase in local network services of $366,000
     (13.0%), an increase in long distance and access services of $752,000
     (6.8%) and an increase in other operating revenues of $203,000 (18.6%).
     Increased local network service revenues were attributable to customer
     growth, growth in second lines and expanded penetration of enhanced
     services.  Higher long distance and access services were generally the
     result of an increase in the number of customers and minutes of use.  The
     increase in other operating revenues is primarily due to an increase in
     Internet-related revenues.

     Total operating expenses for the three-month period ended March 31, 1999
     increased $1,351,000 (13.0%) over the preceding year.  That change is
     principally the result of an increase in network and other operating
     expenses of $914,000 (14.7%), and an increase in depreciation and
     amortization of $320,000 (11.0%).  The increase in network and other
     operating expenses consists of an increase in personnel costs due to an
     expansion of existing business and an increase in personnel and other
     expenses due to start-up activities of CLEC and Internet-related services.
     Temporary increases in data processing expenses currently being experienced
     are necessary to maintain both existing and new systems during conversion
     activities and will cease beginning in the third quarter.  The increase in
     depreciation and amortization is the direct result of the growth in fixed
     assets to serve current and future customer needs.  The increase in total
     operating revenues discussed above coupled with the increase in total
     operating expenses resulted in net operating revenues increasing $92,000
     (1.6%) between 1999 and 1998.

     Interest income decreased $115,000 primarily due to a shift in investments
     to available for sale securities.  The net decrease in Sundry income (non-
     operating) of $749,000 is primarily due to receipts from a one-time
     insurance settlement in 1998, offset by an increase in cellular partnership
     income in 1999 over 1998.

     The increase in net operating revenues for the three-month period ended
     March 31, 1999, in conjunction with the decrease in Sundry income, net,
     resulted in a decrease of $820,000 (12.6%) in earnings before income taxes.

     The Registrant's effective tax rate was 40% and 35% for the quarters ended
     March 31, 1999 and 1998 respectively. The increase in the effective tax
     rate results from receipt of a non-taxable life insurance settlement in the
     quarter ended March 31, 1998.

3.   Adoption of New Accounting Pronouncements
     -----------------------------------------

     In June, 1998, the Financial Accounting Standards Board issued SFAS No.
     133, "Accounting for Derivative Instruments and Hedging Activities".  The
     Registrant does not expect this pronouncement to impact the consolidated
     financial statements because the Registrant has not entered into derivative
     or hedging transactions.


     Statement of Position 98-1 (SOP 98-1), "Accounting for the costs of
     Computer Software Developed or Obtained for Internal Use," has been adopted
     by the Registrant effective January 1, 1999. SOP 98-1 provides guidance on
     capitalizing costs of computer software developed or obtained for internal
     use. The Registrant does not expect SOP 98-1 to have a material effect on
     its financial statements.


                                       6
<PAGE>
 
4.   Year 2000
     ---------

     (a)  State of Readiness
          ------------------

     The Registrant has taken actions to understand the nature and extent of the
     work required in order to make its systems and infrastructure Year 2000
     compliant.  The Registrant began work last year to prepare its information
     technology (IT) and non-information technology (non-IT) systems, including
     updating and/or replacing existing legacy systems.  The Registrant has
     formed a Corporate Year 2000 Task Force, which is responsible for all Year
     2000 activities and is being monitored by senior management and the Board
     of Directors.

     There are six phases of the Registrant's Year 2000 program: Awareness,
     Inventory, Assessment, Renovation, Validation and Implementation.  The
     Registrant has defined the six phases as follows:

     Awareness - Gain the commitment of management and staff to solving the
     problem.  This phase has been completed.

     Inventory - Conduct a thorough inventory of all hardware and software
     systems.  This phase will run until December, 1999 in order to maintain the
     inventory throughout the life of the project.

     Assessment and Planning - Decide which systems to retire, repair or
     replace.  Prepare contingency plans.  This phase has been completed.

     Renovation - Perform upgrades to hardware and software.  This phase is
     underway and is scheduled to be completed in June, 1999.  The Registrant
     has contracted to outsource certain operational support, billing and
     accounting systems to a third party vendor.  The software and hardware
     components of the systems selected have been certified by the vendor as
     Year 2000 compliant.  Remediation of mission critical systems is ninety
     percent complete at this time.  The remaining ten percent of mission
     critical systems are scheduled to be remediated by June, 1999.

     Validation - Test and certify new and renovated systems.  This phase is
     underway and is scheduled to be completed in April, 1999.

     Implementation and Follow-up - New or renovated systems go into service.
     This phase is scheduled to be completed in December, 1999, and will include
     the resolution of any outstanding problems.  The Year 2000 Project will
     extend until March, 2000 in order to address the leap day of February 29,
     2000 and to address any outstanding issues.

     The Registrant's Year 2000 issues related to third parties can be broken
     into two categories: third party vendors who supply products to the
     Registrant, and other telecommunications companies who provide joint
     service to our customers.  The third party vendors have been providing the
     Registrant with Year 2000 solutions on an on-going basis.  Year 2000
     upgrades, repairs and testing are being performed as per vendor
     specifications.  Other telecommunications service providers are
     implementing Year 2000 programs in much the same fashion as the Registrant
     and industry testing is being performed on an on-going basis.

     (b)  Cost to Address Year 2000 Issues
          --------------------------------

     Expenditures related to Year 2000 remediation, the data processing
     transition plan, license fees for purchase of software and training and
     implementation costs are not expected to exceed $3.5 million, $2.0 million
     of which has been incurred through March 31, 1999. Costs related to
     implementation of new systems are being capitalized, in accordance with SOP
     98-1, and will be amortized over the estimated useful life of the asset
     beginning in approximately the second quarter of 1999, the anticipated
     completion date of the project. The remainder of these costs, including
     Year 2000 remediation costs, will be expensed as incurred.


                                       7
<PAGE>
 
     (c)  Risks of Year 2000 Issues
          -------------------------

     The most reasonably likely worst case scenario is loss of services to other
     interconnecting companies who have not attained Year 2000 compliance. This
     is unlikely to occur since the interconnecting companies realize their
     responsibility to comply. However, should this worst case scenario occur,
     the Registrant will give customers the option of rerouting service to a
     working carrier.

     (d)  Contingency Plan
          ----------------

     The Registrant has developed a Corporate Year 2000 Contingency Plan to
     cover its primary business activities.  This plan outlines the key areas of
     business, and the manner in which they will be supported in the event of a
     Year 2000 failure.  This plan has been developed as a result of research
     into United States Telephone Association member telephone company responses
     to hurricanes, tornadoes, ice storms and other disasters.  The Registrant
     has studied and modified these plans to cover operations during potential
     Year 2000 related failures.  The Registrant has also updated and revised
     the existing Emergency Response Plan. The Registrant's Emergency Response
     Plan will form the core of the Registrant's Contingency Plan if a major
     service outage should occur.

     Key components of the Contingency Plan are the preparations to revert to a
     manual operation, stockpiling and conservation of materials, increased
     staffing levels, data storage for processing at a later date, isolation of
     harmful network elements and positioning key personnel in areas where they
     will be most effective.  Should there be a serious service affecting
     problem, the Emergency Response Plan will be activated until all services
     are restored.  Events, which could trigger activation of the Emergency
     Response Plan, include widespread loss of gas or electric service, failures
     at various interconnecting companies or failure of internal switching or
     transmission systems.



                                     ITEM 3

                    QUANTITATIVE AND QUALITATIVE DISCLOSURES

                               ABOUT MARKET RISK
                                        


1.   There have been no material changes in reported market risks faced by the
     Registrant since December 31, 1998.

                                       8
<PAGE>
 
                                   SIGNATURES



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



                                    NORTH PITTSBURGH SYSTEMS, INC.
                                    ------------------------------
                                            (Registrant)



Date   April 30, 1999              /s/ H. R. Brown
    ---------------------          --------------------------------
                                   H. R. Brown, President



Date   April 30, 1999              /s/ A. P. Kimble
    ---------------------          ----------------------------------------
                                   A. P. Kimble, Vice President & Treasurer

                                       9
<PAGE>
 
                               OTHER INFORMATION
                                        


Item 6.  Exhibits and Reports on Form 8-K
         --------------------------------

         (a) Exhibits - Exhibit Index for Quarterly Reports on Form 10-Q.
             --------                                                    
<TABLE>
<CAPTION>
 
Exhibit
Number                       Subject                         Applicability
-------                      -------                         -------------  
<S>          <C>                                      <C>
 
 (2)         Plan of acquisition, reorganization,     Not Applicable
             arrangement, liquidation or
             succession
 
 (3) (i)     Articles of Incorporation                Provided in Quarterly Report
                                                      on Form 10-Q for the quarter
                                                      ended June 30, 1996 and
                                                      Incorporated Herein by
                                                      Reference.
 
 (3) (ii)    By-Laws                                  Provided in Annual Report
                                                      on Form 10-K for the year
                                                      ended December 31, 1998
                                                      and Incorporated Herein by
                                                      Reference.
 
 (4)         Instruments defining the rights of       Provided in Registration of
             security holders including indentures    Securities of Certain
                                                      Successor Issuers on Form
                                                      8-B filed on June 25, 1985 and
                                                      Incorporated Herein by
                                                      Reference.
 
 (10)        Material Contracts                       Not Applicable
 
 (11)        Statement re computation of per          Attached Hereto
             share earnings
 
 (15)        Letter re unaudited interim financial    Not Applicable
             information
 
 (18)        Letter re change in accounting           Not Applicable
             principles
 
 (19)        Report furnished to security holders     Not Applicable
 
 (22)        Published report regarding matters       Not Applicable
             submitted to a vote of security holders
 
 (23)        Consents of experts and counsel          Not Applicable
 
 (24)        Power of attorney                        Not Applicable
 
 (27)        Financial Data Schedule                  Attached Hereto
 
 (99)        Additional exhibits                      Not Applicable
 
</TABLE>

         (b) Reports on Form 8-K - No reports on Form 8-K were filed during the
             -------------------                                               
             quarter ended March 31, 1999.

                                       10