A pun on Obi-Wan Kenobi's "Use the Force, Luke!" in Star Wars.
- Rhymes: -ɛl
- (Internet) Initialism of .
- UTSL is used as a suggestion that someone should read the source code instead of trying to read a confusing manual. It was used more in the times when everyone had access to Unix source. Nowadays everybody can legally read source code of Linux and other free Unix clones again.
Use the Source, Luke