500,000 ASL users???? That has me baffled because when you add up all the Deaf schools in all 50 states plus Canadian Deaf schools then there are the Deaf social nightclubs then there are the Deaf persons with a hearing family like me then there are the ASL Interpreters. I would have to say somewhere close to 5 to maybe 7 million ASL users even at that time in 1987. It all adds up quickly. I am not sure how that author got 500,000 ASL users ? That is mysterifying to me 500,000 ASL users. That can't be .....