Keywords: IBM1620A.jpg IBM 1620 Model I Level A prototype as it appeared in the IBM announcement of the machine 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 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 en wikipedia 2002-12-30 upload date byRTC at http //en wikipedia org en wikipedia 1959 page is/was http //en wikipedia org/w/index php title Image 3AIBM1620A jpg here All following user names refer to en wikipedia 2002-12-30 22 10 RTC 400×309×8 78990 bytes <nowiki> IBM 1620 Model I Level A prototype reduced</nowiki> 1959 in Maryland People of the United States in 1959 IBM computers People using computers in the 1950s Aberdeen Proving Ground Sitting men IBM 1620 Punched tapes |