X0202 4 2006-01-06 0 0000880562 UNIFY CORP UNFY 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M C/O SPECIAL SITUATIONS FUNDS 527 MADISON AVENUE, SUITE 2600 NEW YORK NY 10022 0 0 1 0 Common Stock 2006-01-06 4 P 0 4760 0.33 A 8608135 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) & David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (QP), Special Situations Cayman Fund, L.P. (Cay), Special Situations Private Equity Fund, LP (PE), Special Situations Technology Fund, L.P. (Tech) & Special Situations Technology II, L.P. (Tech II), respectively. 2,724,072 shares of CS & 854,646 Wts cvt into 861,910 shares of CS are held by QP, 887,300 shares of CS & 309,880 Wts cvt into 312,514 shares of CS are held by Cay, 1,396,500 shares of CS & 507,080 Wts cvt into 511,390 shares of CS are held by PE, 233,140 shares of CS & 84,520 Wts cvt into 85,238 shares of CS are held by Tech & 1,169,960 shares of CS & 422,520 Wts cvt into 426,111 shares of CS are held by Tech II. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, Cay, PE, Tech & Tech II is limited to the extent of his pecuniary interest. Austin W. Marxe 2006-01-06 David M. Greenhouse 2006-01-06