X0202 4 2004-09-28 0 0000877931 ARTISOFT INC ASFT 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M 153 E 53RD ST 55TH FL NEW YORK NY 10022 0 0 1 0 Common Stock 2004-09-28 4 C 0 1173332 2.045 A 1991922 I By Limited Partnerships Common Stock 2004-09-28 4 P 0 1870602 1.1386 A 3862524 I By Limited Partnerships Convertible Preferred 2.045 2004-09-28 4 C 0 960000 2.045 D 2001-08-08 2004-09-28 Common Stock 1173332 960000 I By Limited Partnerships Converted 960,000 shares of Preferred Stock for 1,173,332 of Common Stock. This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Cayman Fund, L.P. (Cayman), Special Situations Private Equity Fund, LP (PE), Special Situations Technology Fund, L.P. (Tech) and Special Situations Technology II, L.P. (Tech II), respectively. 1,484,310 shares of CS, 394,952 Wts to purchase 78,283 CS are owned by Cayman, 1,436,649 shares of CS, 394,952 Wts to purchase 78,283 CS are owned by PE, 122,865 shares of CS, 34,018 Wts to purchase 6,743 CS are owned by Tech, and 620,938 shares of CS, 173,846 Wts to purchase 34,453 CS are owned by Tech II. The interest of Marxe and Greenhouse in the shares of Common Stock owned by Cayman, PE, Tech, and Tech II is limited to the extent of his pecuniary interest. additional date 11/14/01 Austin W. Marxe 2004-09-29 David M. Greenhouse 2004-09-29