[PSYC - Protocol for SYnchronous Conferencing PSYC is a modern protocol for a messaging infrastructure for text-based conferencing (but also enabling transparent binary data). It has learned from protocols as IRC and XMPP and found an approach that can indeed scale globally, by generalizing the multicast concept beyond chatrooms to presence awareness, news- and friendcasting and leers at decentralized privacy-driven social networking (using trust metrics) and even telephony. Also, chatrooms are programmable, which enables for applications like event notification.]