Criminological research exploring the phenomena of cybercrime and technology-enabled offending has increased dramatically over the last two decades, examining changes in offender behavior, victim characteristics, and the applicability of existing theories for these crimes. There is no systematic assessment of this literature or the gaps in our knowledge that require careful measurement and analysis. This study explores the evolution of the termcybercrime and the range of activities that fall into this category of offending, including computer hacking, malware, piracy, fraud, pornography, prostitution, cyberbullying, cyberstalking, and cyberterrorism. The challenges inherent in measuring these offenses and pertinent theoretical and empirical issues are examined in depth.