The International Open Source Network (IOSN) is an initiative of APDIP and supported by the International Development Research Centre of Canada. IOSN is a Centre of Excellence for Free/Open Source Software (FOSS), Open Content and Open Standards in the Asia-Pacific region. It is a network with a small secretariat based at the UNDP Regional Centre in Bangkok and three centres of excellence - IOSN ASEAN+3, IOSN PIC (Pacific Island Countries), and IOSN South Asia, based in Manila, Suva and Chennai respectively.
IOSN provides policy and technical advice on FOSS to governments, civil society and the private sector. It produces FOSS awareness and training materials and distributes them under open content licenses. It also organizes awareness raising, training, research and networking initiatives to assist countries in developing a pool of human resources skilled in the use and development of FOSS. IOSN works primarily through its web portal http://www.iosn.net that is collectively managed by the FOSS community. The web portal serves as a clearinghouse and a platform for knowledge sharing and collaborations.