IBM 5120

IBM 5120
ManufacturerIBM
TypeProfessional Computer
Release dateFebruary 1980; 44 years ago (1980-02)
Introductory priceUS$13,500 (equivalent to $49,900 in 2023)
Media2 × 8-inch 1.2 MB floppy disk drives
Operating systemAPL, BASIC
CPUIBM PALM processor
Memory16–64 KB RAM (with 16 KB iterations)
64 KB ROM
Display9-inch CRT
InputKeyboard
Mass45 kg (99 lb)
PredecessorIBM 5110
SuccessorIBM Datamaster
Closeup of a running 5120

The IBM 5120 Computing System (sometimes referred to as the IBM 5110 Model 3) is a 16-bit microcomputer developed by IBM and released in February 1980. Marketed as the desktop follow-on to the portable IBM 5110 Computing System, it featured two built-in 8-inch 1.2 MB floppy disk drives, an integrated 9-inch monochrome monitor, 32 KB RAM, plus an optional IBM 5114 stand-alone diskette unit with two additional 8-inch 1.2 MB floppy disk drives.[1]

The system was sold with both APL and BASIC languages in ROM, and provided a toggle switch on the front panel to select the language. APL allowed numerous business software written on IBM minicomputers to run on the 5120.[2]

  1. ^ "IBM 5120 Computing System". IBM Archives. Archived from the original on 10 November 2011. Retrieved 19 October 2011.
  2. ^ "IBM 5120 Computing System". Old-Computers.com Museum. Archived from the original on 2010-11-20.