Skypix was probably the worl's first modern, fully interactive online graphics-and-sound protocol. Released as part of the Atredes BBS system (later renamed Skyline) in 1987, Skypix for the first time allowed BBS sysops to run systems with rich graphics, changeable fonts, mouse-controlled actions, animations and sound. It predated Mosaic - and thus the World Wide Web itself - by several years, though it had most of the same capabilities.