DeskMate
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DeskMate is a software application that provides a graphical operating environment. It originally was for Tandy Corporation's TRSDOS Operating System for their TRS-80 line of computers, but eventually
DeskMate version 3.02
TRS-80 Model 4
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The TRS-80 Model 4 is the last Z80-based home computer family by Radio Shack, sold from April 1983 through late 1991.
TRS-80 Model 4, 1983 non-gate array version
TRS-80 Model 4P