DATA I/O CORP — Director's Dealing 2005

Dec 19, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DATA I/O CORP (DAIO)
CIK: 0000351998
Period of Report: 2005-12-15

Reporting Person: BISCO INDUSTRIES INC (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-12-15	Data I/O	M	7500	$1.251	Acquired	11057	Direct
2005-12-15	Data I/O	M	5000	$2.2	Acquired	16057	Direct
2005-12-15	Data I/O	M	6250	$1.885	Acquired	22307	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-12-15	Data I/O Stock Option	$1.251	M	7500	Disposed	2008-05-15	Data I/O (7500)	Direct
2005-12-15	Data I/O Stock Option	$2.2	M	5000	Disposed	2007-06-19	Data I/O (5000)	Direct
2005-12-15	Data I/O Stock Option	$1.885	M	6250	Disposed	2009-05-20	Data I/O (6250)	Direct

Footnotes

F1: 1 Exercisable quarterly over three year period ending 6/19/04.

F2: 2 Exercisable quarterly over three year period ending 5/15/05.

F3: 3 Exercisable quarterly over three year period ending 5/20/06.