The show was the brainchild of Casey Kasem and Don Bustany and on the first broadcast in was heard on 8 stations and soon became the most listened to syndicated show in the USA on over 600 plus station.
I listened to it religiously and kept my own written record of the songs and their chart movement. The show captivated me and I have every episode from the 70's and almost all of the 80's as well.
This is the show that made me want to get into broadcasting and be on the radio. Kasem passed away in 2014 but his legacy with AT 40 still lives on thru re-broadcasts as well as internet groups, books and much more.
As I write this I am indeed listening to the first ever broadcast of AT 40 and the memories come flooding back with great things. Wow....50 YEARS...very hard to believe. LONG LIVE AT 40 FROM THE 70'S AND 80'S.