Exhibit 11
DETECTION SYSTEMS, INC.
COMPUTATION OF EARNINGS PER SHARE
(In thousands, except per share data)
Year Ended March 31, 2000 1999 1998
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Net income applicable to common stock $3,468 $4,471 $1,382
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Weighted average number of shares 6,344 6,319 5,433
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Basic earnings per share $0.55 $0.71 $0.25
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Shares attributable to deferred
compensation plans and stock
options and warrants 480 508 290
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Diluted earnings per share: $0.51 $0.65 $0.24
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