Exhibit No. 11 CNS, INC. Computation of Net Income per Share of Common Stock (unaudited) Three months ended March 31, --------------------------- 1997 1996 ----------- ----------- NET INCOME Income from continuing operations $ 1,321,493 $ 3,100,937 Loss from discontinued operations 0 0 ----------- ----------- Net income $ 1,321,493 $ 3,100,937 =========== =========== PRIMARY EARNINGS PER SHARE: Weighted average number of common and common equivalent shares outstanding: Weighted average common shares outstanding 19,205,000 17,446,000 Incentive stock options 520,000 709,000 Non qualified stock options 319,000 399,000 Warrants 0 75,000 ----------- ----------- 20,044,000 18,629,000 =========== =========== Earnings per share from continuing operations $ .07 $ .17 Loss per share from discontinued operations .00 .00 ----------- ----------- Primary earnings per share $ .07 $ .17 =========== =========== FULLY DILUTED EARNINGS PER SHARE Weighted average number of common and common equivalent shares outstanding: Weighted average common shares outstanding 19,205,000 17,446,000 Incentive stock options 520,000 756,000 Non qualified stock options 319,000 426,000 Warrants 0 78,000 ----------- ----------- 20,044,000 18,706,000 =========== =========== Earnings per share from continuing operations $ .07 $ .17 Loss per share from discontinued operations .00 .00 ----------- ----------- Fully diluted earnings per share $ .07 $ .17 =========== ===========