Exhibit 11 NAI TECHNOLOGIES, INC. AND SUBSIDIARIES (In thousands) - -------------------------------------------------------------------------------------- Three Months Ended March 28, March 29, 1998 1997 - -------------------------------------------------------------------------------------- Net Income (loss) $174 $379 Average shares of common stock outstanding during the period 9,155 9,028 -------- -------- Basic Earnings per share $0.02 $0.04 ======== ======== Net Income (loss) 174 379 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 174 379 ======== ======== Average shares of common stock outstanding during the period 9,155 9,028 Incremental shares from assumed exercise of stock options, stock warrants & employee stock purchase plan 2 1,171 Dilution from Convertible Debt 0 0 Total shares used to calculate diluted EPS 9,157 10,199 -------- ------- Diluted earnings per share $0.02 $0.04 ======== =======