EXHIBIT 11 CACI INTERNATIONAL INC AND SUBSIDIARIES COMPUTATION OF EARNINGS PER COMMON AND COMMON EQUIVALENT SHARE Three Months Ended September 30, ------------------ 1997 1996 ---- ---- Net income $ 2,432 $ 2,698 Average shares outstanding during the period 10,705 10,298 Dilutive effect of stock options after application of treasury stock method 370 593 ------ ------ Average number of shares outstanding during the period 11,075 10,891 ====== ====== Earnings per common and common equivalent share $ 0.22 $ 0.25 ====== ======