<ARTICLE>                     5
<LEGEND>
    This schedule  contains summary  financial  information  extracted from the
condensed  consolidated  balance  sheet  at  April  4,  1999  and the  condensed
consolidated statement of income for the three months ended April 4, 1999 and is
qualified in its entirety by reference to such financial staements.
</LEGEND>
<CIK>          0000097210     
<NAME>         Teradyne, Inc.
<MULTIPLIER>                                   1,000
<CURRENCY>                                     U.S. Dollars
       
                             
<PERIOD-TYPE>                   3-Mos
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   APR-04-1999
<EXCHANGE-RATE>                                1.00
<CASH>                                         195,758
<SECURITIES>                                   11,805 
<RECEIVABLES>                                  262,936
<ALLOWANCES>                                   2,873  
<INVENTORY>                                    242,344
<CURRENT-ASSETS>                               787,140
<PP&E>                                         881,863
<DEPRECIATION>                                 444,122
<TOTAL-ASSETS>                                 1,349,228
<CURRENT-LIABILITIES>                          255,203
<BONDS>                                        0        
<PREFERRED-MANDATORY>                          0      
<PREFERRED>                                    0         
<COMMON>                                       10,623 
<OTHER-SE>                                     1,052,863
<TOTAL-LIABILITY-AND-EQUITY>                   1,349,228
<SALES>                                        344,454
<TOTAL-REVENUES>                               344,454
<CGS>                                          219,858
<TOTAL-COSTS>                                  322,063
<OTHER-EXPENSES>                               0        
<LOSS-PROVISION>                               0        
<INTEREST-EXPENSE>                             462    
<INCOME-PRETAX>                                25,707 
<INCOME-TAX>                                   25,707 
<INCOME-CONTINUING>                            0      
<DISCONTINUED>                                 0      
<EXTRAORDINARY>                                0       
<CHANGES>                                      0      
<NET-INCOME>                                   17,995 
<EPS-PRIMARY>                                  0.21   
<EPS-DILUTED>                                  0.20