# Cyber

*Cyber* (taken from [cybernetics](cybernetics.md), the theory of communication and control, coming from Greek *kybernetes*, *steersman*) is a word prefix that signifies relatedness to [computers](computers.md), especially computer networks and [Internet](internet.md). It is nowadays used mainly for relating old concept to the [modern](modern.md) world dominated by computers. By itself or as a verb "cyber" often signifies *cybersex*. Some terms using the prefix include mentioned [cybernetics](cybernetics.md), [cyberpunk](cyberpunk.md), [cybersex](cybersex.md), [cyberspace](cyberspace.md), [cybercrime](cybercrime.md), [cyberbullying](cyberbullying.md), [cyberculture](culture.md), [cyborg](cyborg.md), [cybersecurity](security.md) etc.