<P> Tandy's DeskMate appeared in the early 1980s on its TRS - 80 machines and was ported to its Tandy 1000 range in 1984 . Like most PC GUIs of the time, it depended on a disk operating system such as TRSDOS or MS - DOS . The application was popular at the time and included a number of programs like Draw, Text and Calendar, as well as attracting outside investment such as Lotus 1 - 2 - 3 for DeskMate . </P> <P> MSX - View was developed for MSX computers by ASCII Corporation and HAL Laboratory . MSX - View contains software such as Page Edit, Page View, Page Link, VShell, VTed, VPaint and VDraw . An external version of the built - in MSX View of the Panasonic FS - A1GT was released as an add - on for the Panasonic FS - A1ST on disk instead of 512 kB ROM DISK . </P> <P> The Amiga computer was launched by Commodore in 1985 with a GUI called Workbench . Workbench was based on an internal engine developed mostly by RJ Mical, called Intuition, which drove all the input events . The first versions used a blue / orange / white / black default palette, which was selected for high contrast on televisions and composite monitors . Workbench presented directories as drawers to fit in with the "workbench" theme . Intuition was the widget and graphics library that made the GUI work . It was driven by user events through the mouse, keyboard, and other input devices . </P> <P> Due to a mistake made by the Commodore sales department, the first floppies of AmigaOS (released with the Amiga1000) named the whole OS "Workbench". Since then, users and CBM itself referred to "Workbench" as the nickname for the whole AmigaOS (including Amiga DOS, Extras, etc .). This common consent ended with release of version 2.0 of AmigaOS, which re-introduced proper names to the installation floppies of AmigaDOS, Workbench, Extras, etc . </P>

The first commercially successful gui operating system was created by which company