History of Microsoft's PC Operating Systems http://winhistory.de/more/windows.htm
1981-2000
MS-DOS
The base of many Windows unless the operating system base (Windows 1-3) or integrated (Windows 95-ME). Only the versions of NT, Windows 2000, Windows XP and later come from without. It is a purely text-based operating system without graphical user interface. All commands must be typed. For example, "time" for time setting "md" for folder creation. The latest version of Microsoft DOS is the integrated 8.x. The last real DOS version, which was to buy it was 6.22 (from 1994).
The first version, 1.0, was in August 1981.
Minimum system: 8086 / 8088 CPU or compatible; 64-256 KB RAM
1987-1990
OS/2
A former project in cooperation with IBM a new, ambitious operating system with the computer world at the end of the 1980s. End this collaboration IBM continued a while the versions from 2.0. Later NT emerged from the development of OS/2.
Minimum system: 286 processor, 3 MB RAM, 30 MB hard disk
1985
Windows 1.0 x
The first GUI (graphical user interface [graphic user interface]) from Microsoft. Instead of laboriously individually type the commands, you could now run commands with a mouse. An achievement was also multi tasking, the parallel running of programs. However, it was not real at the time, Windows continued to simply all programmes up to the active.
Minimum system: 8088er processor with 4.7 MHz; 256 KB RAM; 2 Floppy drives or hard drive; MS DOS 2.0 to 5.0
Windows 1.01
Windows 1.02
Windows 1.03
Windows 1.04
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