GUI system. GEM was created as an alternative window
system to run on IBM PC systems, either on top of
MS-DOS (like Microsoft Windows) or on top of CPM-86,
DR’s own operating system that MS-DOS was patterened
after. GEM achieved minimal success in the PC world,
but was later used as the native GUI on the Atari ST
machines.
GEOS
GEOS was another very early graphical desktop system.
Originally written for the 8 bit home computer
Commodore 64 it was later ported to IBM PC systems. It
came with several application programs like a calendar
and word processor, and a cut-down version served as
the basis for America Online’s DOS client. Compared to
the competing Windows 3.0 GUI, it could run reasonably
well on simpler hardware.
Revivals were seen in the HP OmniGo handhelds, Brother
GeoBook line of laptop-appliances, and the New Deal
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