This document discusses cyber crime. It begins by defining cyber crime and noting that computers are often the object or tool of criminal acts like hacking, identity theft, and child pornography. The history of cyber crime is traced back to the first spam email in 1976 and computer virus in 1982. Various types of cyber crimes are outlined such as hacking, theft, cyber stalking, and identity theft. The document also discusses international laws related to cyber crime and Bangladesh's laws targeting this issue. It concludes by providing tips to protect against cyber crime such as using strong passwords and antivirus software.