##### 



Exhibit 99

TRW Inc. and Subsidiaries
Computation of Ratio of Earnings
to Fixed Charges  Unaudited

(In millions except ratio data)

|                                                   |                     |   |               |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |   |       |       |    
|-------------------------------------------------- | ------------------- | - | ------------- | ---- | ----------------------- | - | ------- | ----- | ---- | - | ------- | ----- | ---- | - | ----- | ----- |  | - | ----- | ----- | --- | - | ----- | ----- | ---
|                                                   |                     |   | Nine Months   |      | Years Ended December 31
|                                                   |                     |   | Ended         |      |                        
|                                                   |                     |   | September 30, |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |  
|                                                   |                     |   | 2001          |      | 2000                    |   | 1999    |       | 1998 |   | 1997    |       | 1996
|                                                   |                     |   |               |      |                         |   |         |       |      |   |         |       |     
|Earnings(loss) from continuing
operations          |                     |   |               |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |   |       |      
|                                                   | before
income taxes |   | $             | (8.0 | )                       |   | $       | 706.4 | (A)  |   | $       | 787.3 | (B)  |   | $     | 746.1 |  |   | $     | 239.7 | (C) |   | $     | 302.2 | (D)
|Unconsolidated affiliates                          |                     |   | 95.2          |      |                         |   | 1.2     |       |      |   | (37.1   | )     |      |   | 1.0   |       |  |   | (8.0  | )     |     |   | 1.4   |      
|Minority earnings                                  |                     |   | 17.7          |      |                         |   | 12.5    |       |      |   | 22.8    |       |      |   | 10.5  |       |  |   | 20.2  |       |     |   | 11.5  |      
|Fixed charges excluding
capitalized interest       |                     |   | 430.4         |      |                         |   | 606.9   |       |      |   | 552.1   |       |      |   | 174.3 |       |  |   | 123.9 |       |     |   | 129.0 |      
|                                                   |                     |   |               |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |   |       |      
|Earnings                                           |                     | $ | 535.3         |      |                         | $ | 1,327.0 |       |      | $ | 1,325.1 |       |      | $ | 931.9 |       |  | $ | 375.8 |       |     | $ | 444.1 |      
|                                                   |                     |   |               |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |   |       |      
|Fixed Charges:                                     |                     |   |               |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |   |       |      
|Interest expense                                   |                     | $ | 368.1         |      |                         | $ | 523.8   |       |      | $ | 476.7   |       |      | $ | 114.4 |       |  | $ | 75.4  |       |     | $ | 84.2  |      
|Capitalized interest                               |                     |   | 4.2           |      |                         |   | 5.0     |       |      |   | 4.7     |       |      |   | 4.7   |       |  |   | 4.5   |       |     |   | 3.5   |      
|Portion
of rents representative of interest factor |                     |   | 62.3          |      |                         |   | 83.1    |       |      |   | 75.3    |       |      |   | 59.9  |       |  |   | 48.5  |       |     |   | 43.2  |      
|Interest expense of
unconsolidated affiliates      |                     |   | 0.0           |      |                         |   | 0.0     |       |      |   | 0.0     |       |      |   | 0.0   |       |  |   | 0.0   |       |     |   | 1.6   |      
|                                                   |                     |   |               |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |   |       |      
|Total fixed charges                                |                     | $ | 434.6         |      |                         | $ | 611.9   |       |      | $ | 556.7   |       |      | $ | 179.0 |       |  | $ | 128.4 |       |     | $ | 132.5 |      
|                                                   |                     |   |               |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |   |       |      
|Ratio of earnings to fixed
charges                 |                     |   | 1.2x          |      |                         |   | 2.2x    |       |      |   | 2.4x    |       |      |   | 5.2x  |       |  |   | 2.9x  |       |     |   | 3.4x  |      
|                                                   |                     |   |               |      |                         |   |         |       |      |   |         |       |      |   |       |       |  |   |       |       |     |   |       |      



|(A) |  | The 2000 earnings from continuing operations before income taxes of $706.4
million, includes an $11.7 million earnings charge, $6.2 million after the
effect of minority interest, for purchased in-process research and
development. See Acquisitions note in the Notes to Financial Statements
of the Companys 2000 Annual Report to Shareholders.
|--- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   
|(B) |  | The 1999 earnings from continuing operations before income taxes of $787.3
million, includes an $85.3 million earnings charge for purchased in-process
research and development. See Acquisitions note in the Notes to Financial
Statements of the Companys 1999 Annual Report to Shareholders.                                                     
|   
|(C) |  | The 1997 earnings from continuing operations before income taxes of $239.7
million includes a $548 million earnings charge for purchased in-process
research and development. See Acquisitions note in the Notes to Financial
Statements of the Companys 1997 Annual Report to Shareholders.                                                        
|   
|(D) |  | The 1996 earnings from continuing operations before income taxes of $302.2
million includes a charge of $384.8 million as a result of actions taken in
the automotive and space and defense businesses. See Special Charges and
Divestiture note in the Notes to Financial Statements of the Companys
1996 Annual Report to Shareholders.