IBM machine, Richmond VA City Hall. I have more processing power in my cellphone. Check out the snazzy ducting system above the CPU, used to evacuate heat from all those tubes and transistors!

Via Flickr:
Title: IBM machine, City Hall

Creator: Adolph B. Rice Studio

Date: 1961 July 21

Identifier: Rice Collection 3364B

Format: 1 negative, safety film, 4 x 5 in.

Rights Info: No known restrictions on publication.

Repository: Library of Virginia, Prints and Photographs, 800 E. Broad St., Richmond, VA, 23219, USA,