Scientific tracking of time is becoming a major need due to the diversity of social media websites /applications. That are seriously affecting the time people spend at work, so people are starting to spend more time at work with less work done. So “Logger” is an application that will help us do so. (Tracing the time spent at work), there is a very large data content that we can monitor and store from a client (monitored computer device) some of these data is not really important to gather as it doesn't help us in studying the behaviour of the client, so , know what data to select and how to gather this selected data is something very important for the good functionality of the monitoring system, in this paper i will present the most important data to gather and how to gather it properly. Key Words: Client, Monitoring, Installed.