Cyberpunk is a sub-branch of science fiction. It characteristically involves a highly computerized society, sometimes actually taking place in cyberspace, hackers, characters enhanced by computer chips, usually with a crummy, dysfunctional society (the punk) often controlled by megacorporations. The style rocketed to prominence with William Gibson's "Neuromancer" (1984) followed by "Count Zero". After a while all the books seem somewhat similar. Definitely not your cup of tea, Joan.
And for those desperate for "N"s, sorry, I already used "Neuromancer".