**Exhibit 31.1**

 

Section 302(a) of the Sarbanes-Oxley Act of 2002

 

I, Frederick R. Hume, certify that:

 

| 1) | I have reviewed this quarterly report on Form 10-Q of Data I/O Corporation; |
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| 2) | Based upon my  knowledge,  this report does not contain any untrue  statement ofmaterial fact or omit to state a material fact  necessary to make the statementsmade, in light of the  circumstances  under which such statements were made, notmisleading with respect to the period covered by this report; |
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| 3) | Based on my knowledge, the financial statements, and other financial information included in thisreport, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; |
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| 4) | The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d – 15(f)) for the registrant and have: |
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|   | a) | Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; |
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|   | b) | Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; |
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|   | c) | Evaluated the  effectiveness of the  registrant’s  disclosure  controls andprocedures  and  presented  in this   report  our  conclusions  about theeffectiveness  of the disclosure  controls and procedures,  as of the end of theperiod  covered by this  report based on such  evaluation;  and |
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|   | d) | Disclosed in this report any change in the  registrant’s  internal  controlover financial reporting that occurred during the registrant’s  most recentfiscal  quarter (the  registrant’s  fourth fiscal quarter in the case of anannual report)  that has  materially  affected or is  reasonably  likely to  materiallyaffect,  the  registrant’s   internal  control  over  financial  reporting. |
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| 5) | The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions): |
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|   | a) | all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and |
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|   | b) | any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting. |
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Date: August 13, 2008 

 

/s/ Frederick R. Hume  

Frederick R. Hume

Chief Executive Officer  

(Principal Executive Officer)

 

 

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