This document discusses cyber crime, including its history and common types. It notes that early hacking was done to learn about computer systems but later became more malicious. The main types of cyber crime covered are hacking, cyber terrorism, cyber theft, and cyber stalking. Hacking involves illegally accessing computers to steal or damage information. Cyber terrorism uses the internet for terrorist activities like disrupting networks. Cyber theft involves stealing personal details to illegally obtain money. Cyber stalking uses technology to harass or threaten an individual. The document also discusses causes of cyber crime and methods to tackle it through strong security across computer networks and domains.