IBM System/23 Datamaster
| Manufacturer | IBM |
|---|---|
| Type | All-in-one (5322), Computer tower (5324) |
| Released | July 1981 |
| Introductory price | US$9,000 (equivalent to $31,872 in 2025) |
| Discontinued | 1985 |
| Operating system | System/34 BASIC |
| CPU | Intel 8085 @ 3.07 MHz |
| Memory | 32 KB,64 KB,96 KB,128 KB DRAM 112/128 KB ROM |
| Removable storage | 0-2 internal 8-inch floppy disk drives, optional external floppy drives |
| Display | Green phosphor CRT display (80 × 24 text) |
| Graphics | Intel 8275 |
| Sound | Internal beeper |
| Input | Model F keyboard |
| Connectivity | Printer port, disk drive port (optional), twinax (optional) |
| Weight | 95 lb (43 kg) |
| Predecessor | IBM 5120 |
| Successor | IBM Personal Computer |
| Related | IBM Displaywriter System |
The System/23 Datamaster (desktop model 5322 and tower model 5324) was an 8-bit microcomputer developed by IBM. Like the 6850 Displaywriter, it was one of the first IBM microcomputers, preceding the IBM Personal Computer (PC), with which it is incompatible. Launched in July 1981, the System/23 was IBM's most affordable computer until the PC was announced the following month, proving to be much more economical and popular.