とあるOS (ToAruOS) is a hobby operating system, built mostly from scratch, in development since December of 2010.
It was originally developed at the University of Illinois at Urbana-Champaign. For a period of time, it was the development focus of the university's SIGOps chapter.
Both the kernel and core userspace are included in this repository. Third-party sources are downloaded during the build process.
Apologies for the mess, I am in the middle of a major rewrite of the とあるOS homepage and still learning to use Jekyll.