The Burroughs Adding Machine Executives

The third photo i suspect to be that of young inventor William s Burroughs who invented the adding machine and is the grandfather of the modern computer. The fourth photo i deduce to be of Mortimer Burroughs sr. And his sons Mortimer jr and William. William would be one of the Literary giants of the 20th century and a key writer of the beatnik movement with Jack Kerouac and Allen Ginsberg