Keywords: BRL64-IBM 1311 DiskDrives.jpg page is was here <nowiki> 17 14 16 September 2005 RTC 200×134 14 542 bytes <span class comment > IBM 1311 Disk Drives Model 2 and Model 3 - clipped from photo of an en IBM 1620 Model II in A FOURTH SURVEY OF DOMESTIC ELECTRONIC DIGITAL COMPUTING SYSTEMS from the BRL at en Aberdeen Proving Ground </span> </nowiki> User RTC on http //en wikipedia org en wikipedia PD-USGov IBM hard disks Removable disk packs Historical computer storage media Aberdeen Proving Ground IBM 1620 IBM 1400 series |