AmigaOS is a single-user operating system based on a preemptive multitasking microkernel (called Exec) originally built for the Motorola 68000-based AMIGA home computer systems, and now compiled for the PowerPC boards which equip AmigaOne XE & SE, MicroA1, AmigaOne 500, AmigaOne X1000, Sam440, Sam460, Pegasos 2 and Amiga Classic PPC computers.
AmigaOS provides a disk operating system called AmigaDOS, a windowing system API called Intuition and a desktop environment called Workbench. A command-line interface (CLI), called AmigaShell, is also integrated into the system, though it also is entirely window based. Original AmigaOS lacked any built-in memory protection – and featured (many) Guru Meditations ;).
Back in December, Hyperion Entertainment (the licensed developer of the AmigaOS since version 4) released the Final Edition version for the 4.1 branch.
Since the initial release of AmigaOS 4.1 more than six years ago, functionality and user experience have been steadily improved by six free major updates and over 88 free smaller ones through AmiUpdate. AmigaOS 4.1 Final Edition defines the new baseline by consolidating all previous updates, bringing new long awaited features and stability improvements and last but not least enabling the user to make a clean installation in one go.
You can buy AmigaOS 4.1FE via this page.
Unfortunately AmigaOS is neither free nor open source.
Please note that emulations like WinUAE or FS-UAE are not officially supported platforms for AmigaOS 4.1 Final Edition for Classic.
Actually WinUAE is well compatible with it, I’ve tested by my own with the latest WinUAE emulator (Amiga 4000, Blizzard PPC, Picasso IV graphics adapter configuration and networking stack) on my Windows 10 laptop.
According to Wikipedia:
AmigaOS 4.0 has been rewritten to become fully PowerPC compatible. It was initially developed on Cyberstorm PPC, as making it independent of the old Amiga chipsets wasn’t trivial.
Also in AmigaOS 4.0 were new version of Amidock, TrueType/OpenType fonts and movie player with DivX and MPEG-4 support. In AmigaOS 4.1, a new Start-up preferences feature was added which replaced WBStartup drawer. Additional enhancements were a new icon set to complement higher screen resolutions, new window themes including drop shadows, AmiDock with true transparency, scalable icons and AmigaOS with auto-update feature.
What can I say… using an operating system without a proper browser is questionable, yet some architectural choices shine even today.