Both the speakers made it clear that open source is a huge and every growing community. Open source is so wide spread that it covers every aspect of computer programming and development. Kevin, who spoke about MongoDB talked about open source from a database perspective and how open source has given rise to many alternatives to sql databases like the nosql database MongoDb. Adrien, who spoke about open source development from a pure programming perspective talked about how open source has taken the GPU programming world by storm. What linked the two speakers was that both of them talked about Big Data and how these two technologies (MongoDB and OpenCL)can prove very useful in performing huge computations for big data analysis.