DATA I/O CORP — Director's Dealing 2004

May 21, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DATA I/O CORP (DAIO)
CIK: 0000351998
Period of Report: 2004-05-20

Reporting Person: WALKER WILLIAM R (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-05-20	Non-Qualified Stock Option (right to buy)	$2.695	A	7500	Acquired	2010-05-20	Non-Qualified Stock Option (right to buy) (7500)	Direct

Footnotes

F1: This option vests quarterly over a three year period.