From 1978 to 1994, CES was held twice each year: once in January in Las Vegas known for Winter Consumer Electronics Show (WCES) and once in June in Chicago, known as Summer Consumer Electronics Show (SCES).
1978–1994 m. buvo rengiama dukart per metus: sausį – Las Vegase pavadinimu Winter Consumer Electronics Show (WCES) ir birželį – Čikagoje pavadinimu Summer Consumer Electronics Show (SCES).