AmigaOS is a family of proprietary native operating systems of the Amiga and AmigaOne personal computers. It was developed first by Commodore International and introduced with the launch of the first Amiga, the Amiga 1000, in 1985. Early versions of AmigaOS required the Motorola 68000 series of 16-bit and 32-bit microprocessors. Later versions were developed by Haage & Partner (AmigaOS 3.5 and 3.9) and then Hyperion Entertainment (AmigaOS 4.0-4.1). A PowerPC microprocessor is required for the most recent release, AmigaOS 4.

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AmigaOS
Screenshot of AmigaOS 4.1
DeveloperCommodore International, Hyperion Entertainment
Written inAssembly language, BCPL, C
OS familyAmiga
Working stateProject closed
Source modelClosed source
Initial releaseJuly 23, 1985; 37 years ago (1985-07-23)
Latest release4.1 Final Edition Update 2 / January 12, 2021; 22 months ago (2021-01-12)
PlatformsM68K: versions 1.0 through 3.9
PowerPC: versions 4.0 through 4.1
Kernel typeMicrokernel
Default
user interface
Graphical (Workbench)
LicenseProprietary
Official websitewww.amigaos.net
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AmigaOS is a single-user operating system based on a preemptive multitasking kernel, called Exec.[1]

It includes an abstraction of the Amiga's hardware, a disk operating system called AmigaDOS, a windowing system API called Intuition, and a desktop environment[2] and file manager called Workbench.

The Amiga intellectual property is fragmented between Amiga Inc., Cloanto, and Hyperion Entertainment. The copyrights for works created up to 1993 are owned by Cloanto.[3][4] In 2001, Amiga Inc. contracted AmigaOS 4 development to Hyperion Entertainment and, in 2009 they granted Hyperion an exclusive, perpetual, worldwide license to AmigaOS 3.1 in order to develop and market AmigaOS 4 and subsequent versions.[5]

On December 29, 2015, the AmigaOS 3.1 source code leaked to the web; this was confirmed by the licensee, Hyperion Entertainment.[6][7]

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