MS WINDOWS
WINDOWS 1.0 : 20, NOV. 1985 WINDOWS 2.0 : 9, DEC. 1987 WINDOWS 3.0 : 22, MAY 1990 WINDOWS 95 : 24, AUG. 1995 WINDOWS NT4.0 : 29, JULY 1996 WINDOWS 98 : JUNE 1998 WINDOWS 2000 : 17, FEB. 2000 WINDOWS XP : 25, OCT. 2001 WINDOWS 8 : 26, OCT. 2012 WINDOWS 10 : 29, JULY 2015 WINDOWS 11 : 5, OCT. 2021