History of Technology in Hospitality By hmc0910 Dec 31, 1960 Hotels start putting swimming pools on property Dec 31, 1970 Public ice machines and In-room refrigerators installed in hotels Dec 31, 1972 Telephones installed in guest rooms Dec 31, 1975 Color TVs installed in guest rooms Dec 31, 1986 First graphic POS system invented Dec 31, 1986 Electronic door keys Dec 31, 1990 Electronic safes installed in guest rooms Dec 31, 1993 Check-out via TV remote Dec 31, 1996 Exedia is launched by Microsoft Dec 31, 1996 Wireless internet access introduced in hotels Dec 31, 1999 WiFi invented by Apple