Hospitality Technology By anaspain Sep 12, 1970 Ice-Cube Markers for in-room use Sep 13, 1972 The first models of telephone sistems. Sep 13, 1975 Color TV in guestroom Sep 13, 1975 Air-conditioning Sep 13, 1979 Electronic air cleaner Sep 13, 1980 Mechanic coded-plastic room key card Sep 13, 1982 Satelite TV Sep 13, 1986 Satelite on-demand movie system/voice Mail Systems Sep 13, 1986 Electronic door-keys Sep 13, 1990 Electronic in room safe/wake-up Systems Sep 13, 1990 Interface between TV systems and PMS Sep 13, 1993 Remote check-in/out systems Sep 13, 1995 High-speed Internet access (wired) Sep 13, 1996 High-speed Internet access (wireless) Sep 13, 2000 Voice-over IP Sep 13, 2000 HDTV