The peace sign used to be associated with the Campaign for Nuclear Disarmament, which attracted more than 100,000 members and drew 250,000 demonstrators to Hyde Park in the Eighties, but many of those who wear it today are too young to recall the sign's origins. It was designed by Royal College of Art graduate Gerald Holtom in a letter to the editor of Peace News in 1958. It is a combination of the semaphore alphabet sign for the letter "n" (two arms pointing down at 45 degrees) and the letter "d" (one arm raised straight above the head), standing for nuclear disarmament.