This document defines cyber crime and discusses its history, evolution, categories, types and prevention. Cyber crime involves using computers and the internet to steal data or commit other illegal acts. The summary defines it as crimes committed using computers as objects or subjects, then discusses how threats have evolved over time. Categories include computers as targets and weapons, while common types are hacking, viruses, phishing, vandalism, terrorism, piracy and fraud. Prevention methods like antivirus software, firewalls and secure online practices are recommended.