IBM Personal Computer AT

IBM PC/AT (System Unit 5170)
Also known as	IBM AT, PC/AT
Manufacturer	IBM
Type	Personal Computer
Release date	14 August 1984
Introductory price	Approx. US$6,000 (equivalent to $17,600 in 2022)
Discontinued	2 April 1987
Units sold	100,000+
Operating system	IBM PC DOS 3.0+; OS/2 1.x; PC/IX 1.1; IBM & SCO Xenix; Windows 1.0–3.1;
CPU	Intel 80286 @ 6 and 8 MHz
Memory	256 KB – 512 KB onboard + 3.5 MB with additional memory cards
Storage	20 MB hard drive; 1.2 MB HD 5.25" (135 mm) floppy drive
Graphics	CGA, EGA
Input	Parallel, serial
Predecessor	IBM Personal Computer/XT
Successor	IBM Personal System/2
Related	IBM Personal Computer

The IBM Personal Computer AT (model 5170, abbreviated as IBM AT or PC/AT) was released in 1984 as the fourth model in the IBM Personal Computer line, following the IBM PC/XT and its IBM Portable PC variant. It was designed around the Intel 80286 microprocessor.

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