© 2005 IBM Corporation
IBM RT: Predecessor to RS/6000 – 1986
From the original Users Guide:
The IBM RT PC microprocessor wasdeveloped by IBM and uses an integrated architecture. The chip set consists of management operations with RT PC is needs of CAD/CAM, engineering and scientific, academic, and other professional environments. Compatibility with the IBM Personal Computer AT is provided through an optional IBM Personal Computer AT Coprocessor and appropriate software. The RT PC consists of a 6150 or 6151 System Unit composed of a processing unit, keyboard, memory, fixed disk drive, high capacity diskette drive, integrated date/time clock, and keylock.