Cyberpunk is a science fiction genre. Most cyberpunk is set in the not-too-distant future and focuses on information technology and computers.
Cyberpunk often features a dystopian near future, with oppressive governments and protagonists who rebel against these societies. The main characters are often computer hackers, and the mood of cyberpunk feels very similar to film noir or classic detective stories. The term cyberpunk was first used in the 1980s — the original cyberpunk novel was "Web of Angels" by John M. Ford, though William Gibson and Bruce Sterling are the authors most well known for writing cyberpunk.