Teradyne to Announce First Quarter 2004 Results

Teradyne, Inc. (NYSE:TER) will release results for the First Quarter 2004 on Tuesday, April 20, 2004, following the close of markets, at 6:30 p.m. Eastern Daylight Time or later.

A conference call to discuss First Quarter 2004 results, along with management's outlook, will follow at 10:00 a.m. Eastern Daylight Time, Wednesday, April 21, 2004. The call will be broadcast simultaneously over the Internet. Interested investors should access the webcast at www.teradyne.com and click on "Investors" at least five minutes before the call begins.

A replay will be available two hours after the completion of the call. The replay number in the U.S. & Canada is 1-800-642-1687. The replay number outside the U.S. & Canada is 1-706-645-9291. The pass code is 6603186. A replay will also be available on the Teradyne web site www.teradyne.com. Click on "Investors" for a link to the replay. The replay will be available via phone and web site through May 5, 2004.