The larger a company becomes, the more difficult it is to keep track of what exactly each employee is doing during working hours. Without appropriate controls, you may find that people start uploading photos to Facebook, playing Farmville, or watching movies from a flash drive when they should be working. Of course, this impacts on employee performance and, as a result, business development. Moreover, this lack of discipline can also lead to IT security issues, e.g. targeted and zero-day attacks launched via vulnerable applications, infections from malicious websites, confidential data leaks from unknown USB flash drives etc.