Exhibit 99

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

(In millions except ratio data)

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|----------------------------------------------------------------- |  | ---------------- | ----- | ---- |  | ----------------------- | ------- | ---- |  | ---- | ------- | ---- |  | - | ----- |  |  | - | ----- | --- |  | - | ----- | ---
|                                                                  |  |                  |       |      |  | Years Ended December 31
|                                                                  |  | Six Months Ended |       |     
|                                                                  |  | June 30, 2001    |       | 2000 |  | 1999                    |         | 1998 |  | 1997 |         | 1996
|                                                                  |  |                  |       |      |  |                         |         |      |  |      |         |     
|Earnings from continuing
     operations before income
     taxes |  | $                | 108.1 |      |  | $                       | 706.4   | (A)  |  | $    | 787.3   | (B)  |  | $ | 746.1 |  |  | $ | 239.7 | (C) |  | $ | 302.2 | (D)
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|Unconsolidated affiliates                                         |  |                  | 87.3  |      |  |                         | 1.2     |      |  |      | (37.1   | )    |  |   | 1.0   |  |  |   | (8.0  | )   |  |   | 1.4   |    
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|Minority earnings                                                 |  |                  | 14.1  |      |  |                         | 12.5    |      |  |      | 22.8    |      |  |   | 10.5  |  |  |   | 20.2  |     |  |   | 11.5  |    
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|Fixed charges excluding
     capitalized interest                 |  |                  | 292.6 |      |  |                         | 606.9   |      |  |      | 552.1   |      |  |   | 174.3 |  |  |   | 123.9 |     |  |   | 129.0 |    
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|Earnings                                                          |  | $                | 502.1 |      |  | $                       | 1,327.0 |      |  | $    | 1,325.1 |      |  | $ | 931.9 |  |  | $ | 375.8 |     |  | $ | 444.1 |    
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|Fixed Charges:                                                   
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|Interest expense                                                  |  | $                | 251.1 |      |  | $                       | 523.8   |      |  | $    | 476.7   |      |  | $ | 114.4 |  |  | $ | 75.4  |     |  | $ | 84.2  |    
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|Capitalized interest                                              |  |                  | 3.0   |      |  |                         | 5.0     |      |  |      | 4.7     |      |  |   | 4.7   |  |  |   | 4.5   |     |  |   | 3.5   |    
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|Portion of rents represen-
     tative of interest factor         |  |                  | 41.5  |      |  |                         | 83.1    |      |  |      | 75.3    |      |  |   | 59.9  |  |  |   | 48.5  |     |  |   | 43.2  |    
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|Interest expense of
     unconsolidated affiliates                |  |                  | 0.0   |      |  |                         | 0.0     |      |  |      | 0.0     |      |  |   | 0.0   |  |  |   | 0.0   |     |  |   | 1.6   |    
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|Total fixed charges                                               |  | $                | 295.6 |      |  | $                       | 611.9   |      |  | $    | 556.7   |      |  | $ | 179.0 |  |  | $ | 128.4 |     |  | $ | 132.5 |    
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|Ratio of earnings to fixed
     charges                           |  |                  | 1.7x  |      |  |                         | 2.2x    |      |  |      | 2.4x    |      |  |   | 5.2x  |  |  |   | 2.9x  |     |  |   | 3.4x  |    
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|(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.
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|(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.                                                     
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|(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.                                                        
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|(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.