The document discusses cyber crime and cyber security. It defines cyber crime as crimes committed using computers and the internet. It then covers the history and evolution of cyber threats. It categorizes cyber crimes as those using computers as targets or weapons. It discusses common types of cyber crimes like hacking, denial of service attacks, and computer vandalism. The document also provides safety tips for preventing cyber crimes and advantages of cyber security. It concludes by stating that technology itself is not the problem but how humans use it.