25th years of evolution in collaborative technologies During the last 25th years, we have witnessed huge evolutions of technologies to support collaborative activities between people and between organisations. Since Doug Engelbart “Mother of all demos” in 1968, most of our dreams have come true regarding group support for collaboration, mobile and ubiquitous communication, and data sharing. We are now connected to anyone at anytime from almost anywhere and we can coordinate actions and share data to achieve common goals. In this talk, we will recall how a combination of advances in science and technologies, together with their appropriation by users, have created an exciting and unexpected landscape for collaboration. We will show how this landscape is still evolving under important tectonic forces driven by new discoveries, artefacts and usage. Although it is a risky exercise, we will try to draw some lines to the future to describe the evolution that is currently occurring in this area and how we expect to see them heading in the future : as an ubiquitous collaborative Web based platform where communities of people can collaborate confidently, as a system without central authority where they can meet, as a platform where they can share and coordinate their action to resolve the big issues of our time.