Exhibit 99

                   NAI TECHNOLOGIES PLANS INVENTORY WRITE-DOWN

Huntington, NY - September 24, 1997 - NAI Technologies, Inc. (NATL-NASDAQ), a
diversified international electronics company with a focus on advanced computer
systems design, announced today that the Company will report a net loss for the
third quarter due to a one-time write-down of approximately $3.0 million that is
substantially related to inventory write-downs at its Codar Technology Inc.
subsidiary, lower than anticipated sales at Codar and a faster than anticipated
decline in the sales of the Wilcom subsidiary's standard MFT analog line
treatment products.

         According to Robert A. Carlson, Chairman and CEO of the Company, "Sales
and operating performance at the Lynwood and Systems subsidiaries remain strong.
Unfortunately Codar's and Wilcom's business levels are well below expectations."

         Codar's inventory write-down was a result of the lower than anticipated
sales as well as the completion of the withdrawal from electronic printer
products and the replacement of certain of Codar's products on the U.S. Army CHS
II program with new more advanced Codar products. These new products on the CHS
II program will provide the U.S. Army with higher performance work stations and
flat panel displays.

         NAI Technologies, Inc. is a leading provider of rugged computers,
peripherals and integrated systems for military, government and commercial
applications. In addition NAI Technologies, Inc. also supplies transmission
equipment for analog, digital and fiber optic communications and data
interchange networks. The Company's diverse customer base includes commercial
markets requiring mobile computer and communications systems, U.S. and foreign
armed services, intelligence agencies, the regional Bell operating companies and
major worldwide independent telephone companies.

This press release may contain forward-looking statements within the meaning of
the Private Securities Litigation Reform Act of 1995. These statements are based
on current plans and expectations of NAI Technologies and involve risks and
uncertainties that could cause actual future activities and results of
operations to be materially different from those set forth in the
forward-looking statements. Important factors that could cause actual results to
differ include, among others, changes in government purchasing policies and
budget constraints, competition, the continuity of booking trends, the absence
of supply interruptions, new products' market acceptance and warranty
performance.

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