COSCUP

Conference for Open Source Coders, Users and Promoters (COSCUP; ) 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 often held in two days, with talks, sponsor and communities booths, and Birds of a feather (computing). In addition to international speakers, many Taiwanese local open source contributors often give talks. The chief organizer, other staffs, and speakers are all volunteers.

COSCUP's aim is to provide a platform to connect open source coders, users, and promoters, and promote FLOSS with the annual conference. The conference is free to attend because of the enthusiastic sponsors and donors. Since the conference venue is limited, tickets are often sold out immediately after the online registration starts.

The lightweight Desktop Environment LXDE was announced at COSCUP 2006.

History
COSCUP's predecessor was the community talks in International Conference on Open Source (, ICOS). In 2006, ICOS's topics no longer fit some attendees' demand; Taiwanese open source community participants initiated COSCUP as a "festival" for Taiwanese open source communities. The first event, COSCUP 2006, was held at National Taiwan University Sports Center, and was a great success with almost 200 attendees. The number of attendees grew to almost 2000 by COSCUP 2014.

In 2014, COSCUP moved to Taipei International Convention Center, with 1,500 attendees, and 110 talks. Later in 2014, COSCUP was back to Academia Sinica Humanities and Social Sciences Building, but the conference also extends to the neighboring Academia Sinica Academic Activities Center. This was the first time COSCUP was held in two venues simultaneously.

Registration
COSCUP's registration set records in 2010, 2011, and 2012, as the server crashed within minutes after registrations began, the registration process is often done after hours, due to heavy server load. In COSCUP 2013, the conference started to use Registrano for registration. The system successfully sustained the heavy load of the registrations, this also led to the later success with KKTIX with COSCUP 2014.