“Original Caption:

New York — Audience members sit in grandstands known as the People’s Wall, in the IBM Pavilion at the New York City World’s Fair.
A mechanical system raised the 500 seat grandstands within the building so that the audience could watch a film on the inner workings
of computer logic. (1964)”

via If Charlie Parker Was a Gunslinger, There’d Be a Whole Lot of Dead Copycats