Vtg 1966 Minnesota Mining Manufacturing Company 3M The Hole In The Card The Story of the Microfilm Aperture Card Book by Neil MacKay.

Neil MacKay wrote this specific corporate history for the Minnesota Mining & Manufacturing Company (commonly known as 3M)

Neil Roderick MacKay

MacKay acted as an industrial historian documenting the intersection of microfilm and automated punch cards during the mid-20th century before digital computing began to take over.