TimeWatcher is a software for businesses which are selling computer access time. With TimeWatcher these businesses can easily control and charge for their customers computer usage. TimeWatcher is used in Internet/Cyber cafes, libraries, hotels, bars. The TimeWatcher software provides numerous functionalities to fulfill the three fundamental demands of a computer access time selling business: To control the computer access of their customers, to protect the computers in the business and to record the sales and revenues of the businesses. Unlike other access control solutions TimeWatcher does not need any special expensive hardware like card readers or modifications of the computers. The customer terminals can be controlled from a central administration computer over a LAN network.