Slang for computer, generally used among users of computer and online games, usually in combination with various other words, e.g. "comp games", "comp chat", "comp gamers", etc.
Workers' compensation, financial compensation for work-related injuries of employees, in particular compensation of loss of wages, sometimes also for medical costs
Companions, in the Christian Church; when the term Comp. follows the name of a Christian saint it denotes the fact that the named saint had companions who were also made saints due to their close association with the named saint and their actions at the time of the act or acts for which the sainthood was attained.