Independent OS

This article is a work in progress. …well, all the articles here are, in a way. But this one moreso, and the article may contain incomplete information and editors’ notes.

Definition

OS-tans made from no existing lineage, and do not create one of their own. Some of the earliest mainframes are independent systems, as are hobbyist systems not based on Unix or Linux.

List

Mainframes

• Colossus
• CSIRAC
• ENIAC
• FUJIC
• Mertvaya Ruka

Other independent systems

• Apple Newton: Mobile devices from Apple, made in the 90's.
• Coleco Adam: Unsuccessful home computer, did not have a successor.
• Contiki: Smallest modern OS, built entirely in Assembly.
• DexOS
• DigiComp: Hobbyist microcomputer first produced in the 60's.
• ECOS
• EMAG-III: Unusual hobbyist computer from the late 50's, was produced by one person for a science fair.
• GENIAC
• MITS Altair 8800
• IMSAI 8080
• Sky OS
• Tiny OS

Part of a lineage, but an independent branch

The Linuxes mentioned aren't derived from any distribution.

• CRUX
• Puppy Linux
• Rainbow 100: The only home computer among the DEC faction.
• Tinfoil Hat Linux
• Yggdrasil Linux: One of the earliest Linux distros but did not produce descendants.
• Yoper