Keywords: TitanII MGC magnetic drum.jpg en Magnetic drum memory unit used in Titan II MGC the ASC-15 made by IBM Missile Launch/Missile Officer LGM-25 Missile Systems USAF Sheppard Technical Training Center May 1967 Student Study Guide OBR1821F/3121f-V-1 thru 4 Volume I of II Edgar Durbin 1967-05 PD-USGov IBM computers Titan rocket Saturn I Instrument Unit |