Full Service Network - The Full Service Network was a Time Warner-coined term for the company's Orlando, Florida, early experiment in interactive cable services.  Full Service Network (FSN) was a revolutionary 1994 Time Warner experiment in interactive cable services. It offered a number of features including video-on-demand, shopping, games, an electronic program guide and US Postal Service functions.  Users each needed a set-top box.

FSN - (Full Service Networks) - Full Service Networks is an antiquated term for a form of interactive TV that would offer a 'full range of services', including home shopping, banking, videoconferencing and more.