What is a system and how can it be studied? In this essay a Learning Management System used in a university distance course is analyzed and described as a system. The different system levels are explained, the components are explored and the fundamental building stones of the system are finally found and defined to be the messages sent by the students in the discussion forum. The method applied is based on Langefors’ Systems Analysis Approach and its pros and cons are discussed in the end of the essay. The conclusions indicate that Langefors’ theories still are adequate and useful in this context.