EXHIBIT A

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13G with respect to the Common Stock of Data I/O Corporation, and any further amendments thereto signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Date:  November  9, 2018

DH PARTNERS, LLC
By Delafield Hambrecht, Inc., its Manager
By:	/s/ John D. Delafield
	John D. Delafield, President
	Delafield Hambrecht, Inc.
DELAFIELD HAMBRECHT PARTNERS FUND
By DH Partners, LLC, its General Partner
By Delafield Hambrecht, Inc., Manager of DH Partners, LLC
By:	/s/ John D. Delafield
	John D. Delafield, President
	Delafield Hambrecht, Inc.
DELAFIELD HAMBRECHT, INC.
By:	/s/ John D. Delafield
	John D. Delafield, President
JOHN D. DELAFIELD
	/s/ John D. Delafield