Open source software is supported by 3 pillars: coders, users and promoters. This conference is for all 3 kinds of people. You may be a coder for software A, a promoter for software B, and a user for software C. No matter you are a newbie user, a passionate promoter or a mature developer or anywhere in between, you are welcome in COSCUP - Conference for Open Source Coders, Users and Promoters! COSCUP is organized by major open source communities in Taiwan. The major goal is to create a friendly and informative environment for people in different communities to make friends, learn new technologies and inspire each other in the conference.