Subject :ICSO Class : Class 6
Ans 2:
Class : Class 10
First GUI version of Windows is Windows 1.0 which was released in November 1985
Ans 4:
Class : Class 7
Following PARC the first GUI-centric computer operating model was the Xerox 8010 Information System (Xerox Star) in 1981, followed by the Apple Lisa (which presented the concept of a menu bar and window controls) in 1983, the Apple Macintosh 128K in 1984, and the Atari ST and Commodore Amiga in 1985.