Conference for Open Source Coders, Users and Promoters is an annual conference held by Taiwanese open source community participants since 2006. It is a major force of free software movement advocacy in Taiwan. The event is typically held over two days and includes talks, sponsor and communities booths, and Birds of a feather sessions. In addition to international speakers, many Taiwanese local open source contributors often give talks. The chief organizer, other staffs, and speakers are all volunteers.