Sprite is an experimental Unix-like distributed operating system developed at the University of California, Berkeley by John Ousterhout's research group between 1984 and 1992.
The primary area of work was the building of a new network file system which made heavy use of local client-side caching in order to improve performance.
Another key addition to Sprite is process migration, which allows programs to be moved between machines at any time.
LFS-like systems also allow for much easier crash recovery, which became a major focus of the project during this period.
[2] By the 1990s it was suffering and the small team supporting the project was simply not able to keep up with the rapid changes in Unix taking place during this time.