AtheOS

AtheOS (a contraction of Athena operating system) is a free software Unix-like operating system for x86-based computers. It was created entirely by a Norwegian programmer, Kurt Skauen, from 1994 to the early 2000s.

The author also ported Khtml to create for AtheOS the ABrowse web browser.

Features

• Its own native 64-bit journaled file system, the AtheOS File System (usually called AFS)
• Support for symmetric multiprocessing
• An original, legacy-free, object-oriented gui architecture
• Support for most of the POSIX standard
• Pre-emptive multitasking with multithreading
• C++ oriented API

After development of AtheOS was stalled for a substantial period of time, a group of AtheOS programmers formed the Syllable project in 2002; development of the system is currently continued under the Syllable operating system code-fork.