I have permission from Ed Thelen to use photos from his site.
A THIRD SURVEY OF DOMESTIC
ELECTRONIC DIGITAL COMPUTING SYSTEMS
Martin H. Weik
Department of the Army Project No. 5803-06-002
Ordnance Management Structure Code No. 5010.11.812
BALLISTIC RESEARCH LABORATORIES - ABERDEEN PROVING GROUND, MARYLAND
{{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|IBM 1620 Model I Level A (prototype) A photograph from original IBM announcement of the 1620. Downloaded (and renamed and reduced) from http://www.ed-thelen.org/comp-hist/BRL61-0536.jpg