AmigaOS 3.1 is described as 'This version was originally shipped with the Amiga 1200 and Amiga 4000 computers. Version added datatypes support and Workbench could load any background image in any format if the required datatype was installed. This feature was also used in Multiview' and is a operating system in the os & utilities category. There are four alternatives to AmigaOS 3.1 for AmigaOS, MorphOS and AROS. The best AmigaOS 3.1 alternative is AROS, which is both free and Open Source. Other great apps like AmigaOS 3.1 are AmigaOS, MorphOS and AmigaOS 3.9.
The AROS Research Operating System is a lightweight, efficient, and flexible desktop operating system, designed to help you make the most of your computer. It's an independent, portable and free project, aiming at being compatible with AmigaOS at the API level (like Wine...
AmigaOS is the proprietary native operating system of the Amiga and AmigaOne personal computers, introduced with the launch of the first Amiga, the Amiga 1000, in 1985.
MorphOS is an AmigaOS-like computer operating system. It is a mixed proprietary and open source OS produced for the PowerPC processor based computers.
The AmigaOS look and feel, though still largely based on the earlier 3.1 release was revised somewhat, with an improved user interface based on ReAction, improved icon rendering and official support for true color backdrops.
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