Exhibit 21 LIST OF SUBSIDIARIES The following are subsidiaries of the Company, respective jurisdictions of their incorporation and names (if any) under which they do business. The Company owns all of the voting securities of each subsidiary. JURISDICTION OF NAME UNDER WHICH NAME INCORPORATION SUBSIDIARY DOES BUSINESS - ------------------------------------------------------------------------------------------------------------- NAI Technologies-- New York NAI Systems Division Systems Division Corporation Wilcom, Inc. New York Wilcom, Inc. Lynwood Rugged United Kingdom Lynwood Systems Ltd. Codar Technology, Inc. Colorado Codar