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HOUSTON, Apr 15, 2002 /PRNewswire-FirstCall via COMTEX/ — Input/Output, Inc.
(NYSE: IO) announced today that it will host a real-time webcast of its first
quarter earnings release conference call. This webcast is scheduled for April
25, 2002 at 9:00 a.m. Central Daylight Time. The earnings release is scheduled
to be released the same day before the market opens.

This live broadcast of the I/O quarterly conference call will be available
on-line at or . Listeners should go to the web
site at least 15 minutes before the broadcast to register, download and install
any necessary audio software. In addition, the webcast will be replayed for one
week after the original call.

There will also be a telephonic replay of the conference call for one week after
the original call. The phone number for the replay is (800) 486-4618 or toll
(402) 998-0078.

Input/Output, Inc. is an industry leader in seismic acquisition imaging
technologies that operate on land, in marine and transition zone environments,
on the sea bottom and in wellbores. The company’s products encompass the life of
oil and gas fields, from exploration and discovery through field abandonment.
Use of Input/Output technology enables the acquisition of better seismic images
at reduced cost and with a focus on reduced environmental impact. Additional
information on Input/Output, Inc. is available on the Internet at or
contact us at .

SOURCE Input/Output, Inc.

CONTACT: Joe Jacquot, Director Marketing of Input/Output, Inc.,
+1-281-879-3683, or