CONSOLIDATED STATEMENT OF CASH FLOWS

    Years ended March 31,
(In thousands) 1998 1997 1996

Increase (decrease) in Cash and Cash Equivalents
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income $ 126,587 $ 110,376 $ 101,454
   Adjustments to reconcile net income to net cash provided by
      operating activities:
         Write-off of in-process technology --- --- 19,366
         Depreciation and amortization 32,709 27,997 22,464
         Undistributed earnings of joint venture (3,747) (1,336) ---
   Changes in assets and liabilities net of effects of NeoCAD
      acquisition:
         Accounts receivable 11,336 7,280 (34,777)
         Inventories, excluding receipts against advances for wafer
            purchases
7,469 (14,095) 19,375
         Deferred income taxes and other 15,644 14,134 (783)
         Accounts payable, accrued liabilities and income taxes
            payable
8,861 (3,193) 7,408
         Deferred income on shipments to distributors 19,543 (1,213) 15,755

            Total adjustments net of effects of NeoCAD acquisition 91,815 29,574 48,808

                  Net cash provided by operating activities 218,402 139,950 150,262

CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term available-for-sale investments (337,500) (247,022) (292,013)
Proceeds from sale or maturity of short-term available-for-sale
   investments
352,149 303,604 92,333
Purchases of restricted held-to-maturity investments (72,281) (72,227) (96,141)
Proceeds from maturity of restricted held-to-maturity investments 72,267 72,189 72,555
Advances for wafer purchases (90,000) (60,000) ---
Acquisition of NeoCAD, net of cash acquired --- --- (33,412)
Property, plant and equipment (29,700) (26,803) (60,506)
Investment in joint venture (67,422) --- (34,316)
Deposit on building (28,351) --- ---
Other --- --- (1,235)

                  Net cash used in investing activities (200,838) (30,259) (352,735)

CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of long-term debt --- --- 243,901
Acquisition of treasury stock (93,795) (32,028) ---
Principal payments on capital lease obligations --- (977) (1,389)
Proceeds from issuance of common stock 27,189 28,324 14,151

                  Net cash (used)/provided by financing activities (66,606) (4,681) 256,663

Net (decrease)/increase in cash and cash equivalents (49,042) 105,010 54,190
Cash and cash equivalents at beginning of period 215,903 110,893 56,703

Cash and cash equivalents at end of period $ 166,861 $ 215,903 $ 110,893

SCHEDULE OF NON-CASH TRANSACTIONS:
Tax benefit from stock options $   16,099 $   16,730 $    7,907
Issuance of treasury stock under employee stock plans 38,669 30,181 8,223
Receipts against advances for wafer purchases 391 9,034 32,966
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid 13,008 13,309 201
Income taxes paid $   39,472 $   34,426 $   74,688
See accompanying notes.

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