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Photos: Windows through the ages
The countdown from 1.0 to 7...

By Tim Ferguson

Published: Wednesday 10 December 2008

As can be seen above, the 16-bit Windows 1.0 featured tiled windows and a graphical user interface - a significant change from previous PC OSes such as MS-DOS, which still used C prompt commands.

Another new feature was that users could run several applications at the same time including the MS-DOS file management program, a calendar, calculator, clock and notepad.

Picture credit: Microsoft