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Exhibit 11
ENGINEERED SUPPORT SYSTEMS, INC.
STATEMENT RE: COMPUTATION OF EARNINGS PER SHARE
Three Months Ended Nine Months Ended
July 31 July 31
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1998 1997 1998 1997
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NET INCOME $1,446,992 $1,297,657 $3,690,232 $3,198,793
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BASIC EARNINGS PER SHARE
Average shares outstanding 4,790,372 4,726,484 4,766,985 4,755,138
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$.30 $.27 $.77 $.67
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DILUTED EARNINGS PER SHARE
Average shares outstanding 4,790,372 4,726,484 4,766,985 4,755,138
Net effect of dilutive stock options<F1> 228,888 203,374 218,921 189,929
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5,019,260 4,929,858 4,985,906 4,945,067
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$.29 $.26 $.74 $.65
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<FN>
<F1> Based on the treasury stock method.
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