operating system
plural
operating systems
random
see also
software
tagged
86-DOS
CP/M
CP/M-86
ELKS
MS-DOS
PC DOS
Windows 1.0
Windows 2.0
Windows 2.1
Windows 2000
Windows 3.0
Windows 3.1
Windows 7
Windows 95
Windows 98
Windows Me
Windows NT 3.1
Windows NT 3.5
Windows NT 4.0
Windows XP
