1


                                                                                                              Exhibit 99

                                                     TRW Inc. and Subsidiaries
                                                 Computation of Ratio of Earnings
                                                   to Fixed Charges - Unaudited
                                                                 
                                                  (In millions except ratio data)






                                            
                                          Six Months                            Years Ended December 31
                                            ended      ------------------------------------------------------------------
                                        June 30, 1995     1994           1993          1992         1991             1990
                                        -------------   --------       --------     --------     --------         --------
                                                                                               
 Earnings(loss) before                                                                                          
   income taxes                             $386.6      $534.5         $359.1        $347.6      $(129.4)(A)       $343.1
                                                                                                                
                                                                                                                
 Unconsolidated affiliates                     1.4        (0.6)           0.7          (0.9)        (1.0)           (13.2)
                                                                                                                
                                                                                                                
 Minority earnings                             4.3         5.2            5.7           2.6         (7.8)            (0.5)
                                                                                                                
                                                                                                                
 Fixed charges excluding                                                                                        
   capitalized interest                       78.6       160.9          194.0         227.1        254.3            252.0
                                              ----       -----          -----         -----        -----            -----
                                                                                                                
                                                                                                                
 Earnings                                   $470.9      $700.0         $559.5        $576.4       $116.1           $581.4
                                            ------      ------         ------        ------       ------           ------
                                                                                                                
                                                                                                                
 Fixed Charges:                                                                                                 
                                                                                                                
 Interest expense                            $48.4      $104.8         $137.8        $162.9       $189.6           $186.9
                                                                                                                
                                                                                                                
 Capitalized interest                          2.5         6.6            7.9          12.7         10.1              7.6
                                                                                                                
                                                                                                                
 Portion of rents representa-                                                                                   
   tive of interest factor                    29.7        54.7           54.0          64.0         64.4             64.6
                                                                                                                
                                                                                                                
 Interest expense of uncon-                                                                                     
   solidated affiliates                        0.5         1.4            2.2           0.2          0.3              0.5
                                               ---         ---            ---           ---          ---              ---
                                                                                                                
                                                                                                                
 Total fixed charges                         $81.1      $167.5         $201.9        $239.8       $264.4           $259.6
                                             -----      ------         ------        ------       ------           ------
                                                                                                                
                                                                                                                
 Ratio of earnings to fixed                                                                                     
   charges                                     5.8x        4.2x           2.8x          2.4x         0.4x(A)          2.2x
                                               ---         ---            ---           ---          ---              --- 
                                                                                                                
<FN>
(A)    The 1991 loss before income taxes of $129.4 million includes a charge of $343 million to 
       cover costs associated with divestment and restructuring activities.  Excluding this charge, 
       the ratio of earnings to fixed charges would have been 1.7x.