1 EXHIBIT 11.1 BOLT BERANEK AND NEWMAN INC. CALCULATION OF NET INCOME (LOSS) PER SHARE Years Ended June 30, 1994, 1993 and 1992 (Dollars in thousands, except per-share data) Year Ended June 30 - - ------------------------------------------------------------------------------------------------------------------------------------ 1994 1993 1992 ----------------------- ---------------------------- ---------------------------- Fully Fully Fully Primary Diluted Primary Diluted Primary Diluted ---------- ---------- ---------- ----------- ---------- ---------- Calculation of shares: Weighted average of shares outstanding 16,179,000 16,179,000 15,705,000 15,705,000 16,227,000 16,227,000 Incremental shares from use of treasury stock method for stock options (a) (a) (a) (a) 277,000 268,000 ---------- ---------- ---------- ----------- ---------- ---------- Shares used in per-share calculations 16,179,000 16,179,000 15,705,000 15,705,000 16,504,000 16,495,000 ========== ========== ========== =========== ========== ========== Income (loss) before extraordinary item $(7,824) $(32,264) $4,153 Extraordinary item 3,648 -------- -------- ------ Net income (loss) $(7,824) $(32,264) $7,801 ======= ======== ====== Per-share amounts: Income (loss) before extraordinary item $ (.48) $ (.48) $ (2.05) $ (2.05) $ .24 $ .24 Extraordinary item .22 .22 ---------- ---------- ---------- ----------- ---------- ---------- Net income (loss) per share $ (.48) $ (.48) $ (2.05) $ (2.05) $ .46 $ .46 ========== ========== ========== =========== ========== ========== <FN> (a) 1994 and 1993 incremental shares were antidilutive and, as a result, were not included in the calculations of net loss per share.