From 1978 to 1994, CES was held twice each year: once in January in Las Vegas known as Winter Consumer Electronics Show (WCES) and once in June in Chicago, known as Summer Consumer Electronics Show.
1978–1994 var mässan alltid säsongsuppdelad och hölls två gånger om året, i januari i Las Vegas som "Winter Consumer Electronics Show" (WCES) och i juni i Chicago i Illinois som "Summer Consumer Electronics Show" (SCES).