was an early computer conferencing system
developed by the University of Guelph
. It was used to implement the systems BIX
as well as numerous other installations such as CompuLink Network
. Some rights to the software were later acquired by the British Columbia company SoftWords, who developed it into CoSy400 and added a simple web interface, before losing interest.
When the BIX system closed down, several former "bixen" approached University of Guelph and SoftWords and obtained the right to release the original version under the GPL. It is now developed as an open source project, and is the basis of the BIX-like NLZero (Noise Level Zero) conferencing service.