Exhibit 11 NAI TECHNOLOGIES, INC. AND SUBSIDIARIES (In thousands) - ---------------------------------------------------------------------------------------- Three Months Ended Jun 27, Jun 28, 1998 1997 - ---------------------------------------------------------------------------------------- Net Income (loss) ($2,553) $ 501 Average shares of common stock outstanding during the period 9,157 9,074 --------- ---------- Basic earnings (loss) per share ($ 0.28) $ 0.06 ========== ========== Net Income (loss) (2,553) 501 Interest on Convertible Debt (Net of Taxes) 0 0 Amortization of OID (Net of Taxes) 0 0 Amortization of Deferred Debt Expense (Net of Taxes) 0 0 --------- ---------- Adjusted Net Income (2,553) 501 ========== ========== Average shares of common stock outstanding during the period 9,157 9,074 Incremental shares from assumed exercise of stock options, stock warrants & employee stock purchase plan 4 1,317 Dilution from Convertible Debt 0 0 Total shares used to calculate diluted EPS 9,161 10,391 --------- ---------- Diluted earnings (loss) per share ($ 0.28) $ 0.05 ========== ========== Exhibit 11 NAI TECHNOLOGIES, INC. AND SUBSIDIARIES (In thousands) - ----------------------------------------------------------------------------------------- Six Months Ended Jun 27, Jun 28, 1998 1997 - ----------------------------------------------------------------------------------------- Net Income (loss) ($2,379) $ 880 Average shares of common stock outstanding during the period 9,156 9,052 -------- -------- Basic earnings (loss) per share ($ 0.26) $ 0.10 ========= ======== Net Income (loss) (2,379) 880 Interest on Convertible Debt (Net of Taxes) 0 0 Amortization of OID (Net of Taxes) 0 0 Amortization of Deferred Debt Expense (Net of Taxes) 0 0 -------- -------- Adjusted Net Income (2,379) 880 ========= ======== Average shares of common stock outstanding during the period 9,156 9,052 Incremental shares from assumed exercise of stock options, stock warrants & employee stock purchase plan 3 1,243 Dilution from Convertible Debt 0 0 Total shares used to calculate diluted EPS 9,159 10,295 -------- -------- Diluted earnings (loss) per share ($ 0.26) $ 0.09 ========= ========