Exhibit 12.1

Computer Sciences Corporation

Ratio of Earnings to Fixed Charges

Nine Months Ended December 27, 2002 and Five Years Ended March 29, 2002

	Fiscal Years Ended
	9 months ended 12/2002*		March 29, 2002		March 30, 2001		March 31, 2000		April 2, 1999		April 3, 1998		March 28, 1997
Earnings
Income before income taxes	$	388,214	$	496,800	$	330,309	$	611,472	$	534,873	$	214,368	$	315,658
Plus
Interest expense		106,391		154,800		106,125		58,135		49,358		51,418		40,780
Imputed interest on operating leases		67,000		97,033		76,900		66,300		64,031		57,105		56,877
Total earnings	$	561,605	$	748,633	$	513,334	$	735,907	$	648,262	$	322,891	$	413,315
Fixed charges
Interest expense	$	106,391	$	154,800	$	106,125	$	58,135	$	49,358	$	51,418	$	40,780
Imputed interest on operating leases		67,000		97,033		76,900		66,300		64,031		57,105		56,877
Total fixed charges	$	173,391	$	251,833	$	183,025	$	124,435	$	113,389	$	108,523	$	97,657
Ratio of Earnings to fixed charges		3.24		2.97		2.80		5.91		5.72		2.98		4.23

* Imputed interest on operating leases based on full year estimates from the 2002 10-K