Before revision: 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.
After revision: ,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.