Version 7: 03/11/15 X/Windows
Version 6: 1996     Windows3.1
Version 5: 95/09/30 Xt/Motif
Version 4: 94/05/07 Xt
Version 3: 93/02/03 Motif
Version 2: 91/12/17 XView
Version 1: 91/02/14 SunView