There are advantages of using the concept of context in the area of Computer- Supported Cooperative Work. However, it was not the case until now. For example, the term awareness has never been used in this area with an explicit association to context. We discuss in this paper the interest to make context explicit in three case studies in the domain of collaborative works. In particular, we propose a framework to understand how context and awareness are related together and to other concepts used in group works, such as user interface and storage. The proposed framework is used to consider groupware systems presented in this paper from the context perspective and to eventually obtain some insight on possible improvements for users.