The Internet as a communication medium has become an increasing part of many people’s day-to-day working lives. As with the introduction of other mass communication technologies, issues surrounding use, abuse, and addiction have surfaced. For instance, according to a recent report carried out by the company SurfControl (Snoddy, 2000), office workers who while away one hour a day at work on various non-work activities (e.g., trading shares, booking holidays, shopping online, etc.) could be costing businesses as much as $35 million a year. The survey found that 59% of office Internet use was not work related and that those who traded in shares, played sports, shopped, and booked holidays cost companies the most. It is clear from research such as this that Internet abuse is a serious cause for concern — particularly to employers. This chapter has a number of objectives. It will first introduce readers to the concept of Internet addiction, before going on to look at the wider issue of Internet abuse in the workplace. Generic types of Internet abuse will be described, in addition to further examination of the reasons why Internet abuse occurs. The chapter ends with an overview of three very specific types of Internet abuse (i.e., online pornography, sexually related Internet crime, and online gambling), that will be of concern to employers, before concluding with some guidelines and recommendations for employers and human resources departments.