This document discusses cyber crimes and provides definitions, common types, and impacts. It defines cyber crime as computer-mediated illegal activities conducted over global networks. Common types include cracking, deleting files, spreading viruses, and email spoofing. The document explains why we should be aware of cyber crimes, as people engage with the internet for many activities. Impacts include effects on personal records, finances, and new opportunities for criminal behavior with advanced technology. Various types of cyber crimes like privacy invasion, voyeurism, identity theft, and cyber stalking are outlined. The document notes challenges in comprehensively regulating cyber crimes globally due to the complex nature of the internet.