Geek Fact for July 19th – It’s All About IBM
In 1988, International Business Machines (IBM) shipped version 4.00 of the PC-DOS operating system. PC-DOS 4.0 had an optional text-based file manager shell (DOSSHELL) with pull-down menus called by typing the F10 key, optional mouse support, a text-based user interface and support for hard disk […]
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