 | |
 A PS/2 Model 55 SX | |
| Developer | International Business Machines Corporation (IBM) |
|---|---|
| Manufacturer | IBM |
| Product family | Personal System/2 |
| Type | Personal computer |
| Release date | May 1989 |
| Lifespan | 1989–1992 |
| Discontinued | May 1992 |
| Units sold | Over 1 million |
| Media | 1.44 MB 3.5-in floppy disks |
| CPU | Intel 386SX at 16 MHz |
| Storage | 30–80 MB hard drive |
| Graphics | Video Graphics Array |
| Power | 120/240 VAC ～ |
| Related | List of IBM PS/2 models |
The Personal System/2 Model 55 SX is a midrange desktop computer in IBM's Personal System/2 (PS/2) family of personal computers. First released in May 1989, the Model 55 SX features an Intel 386SX processor running at a clock speed of 16 MHz. In October 1990, IBM introduced a diskless workstation version of the Model 55 SX, called the Personal System/2 Model 55 LS. The Model 55 SX was the best-ever selling computer in the PS/2 range, accounting for 23 percent of IBM's PC sales within four months of its introduction. By 1991, the PS/2 Model 55 SX was the best-selling x86-based PC in the world.[1]