Exhibit 21

Subsidiaries of the Company

		Doing Business
Subsidiary	State of Incorporation	under the Following Names
Sign Builders of America, Inc.	Delaware	N/A
Applied Nanotech, Inc.	Delaware	Applied Nanotech, Inc.
Electronic Billboard Technology, Inc.	Delaware	Electronic Billboard Technology, Inc.
EZ Diagnostix, Inc.	Texas	EZ Diagnostix, Inc.