For whoever it may concern :
The International Conference on Open Source Systems (OSS) is a long-standing international forum for researchers, practitioners from business and industry, enthusiasts, and students to present and discuss the latest trends, experiences, and concerns in the field of Free/Libre Open Source Software.
The 12th OSS Conference will take place in will take place in the city of Gothenburg, in 30 May - 02 June 2016. The four-day conference program includes Research papers, Industry Talks, Keynotes, Workshops, Doctoral Consortium, Tutorials, Panels.
You can find the program here.