There are three main targets of computer surveillance used in corporate situations. They are tracking web surfing, tracking e-mails and tracking chat rooms and message boards. Along with this there are other mechanisms used as well.
Means are available to locate and retrieve hidden or deleted files.
Documents can also be tracked to see who downloads and views them. Since corporations own the equipment, employees have very limited privacy rights concerning the communications they make while at work. Currently, companies are under no obligation to inform employees of their monitoring procedures. Today, around the world millions of people using the Internet for information research, retail purchase, and correspondence on a daily basis. However, most of them probably haven't thought about the legal issues involved in the electronic communication and commerce.