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1981

IBM PC (model 5150)

IBM

IBM PC (model 5150)
Photo by Boffy b, Wikimedia Commons, CC BY-SA 3.0 · source

Specifications

CPU
Intel 8088 @ 4.77 MHz
Memory
16 KB or 64 KB on the board; up to 640 KB total
Storage
Cassette port; one or two 5.25" 160 KB floppies
Display
MDA (text) or CGA (color, 320×200)
OS
PC DOS 1.0, CP/M-86, UCSD p-System
Intro price
$1,565 (basic) to over $3,000 with floppies and a monitor

The machine

Designed in a year by a small team in Boca Raton, Florida, working outside IBM's normal processes. They used off-the-shelf parts and published the technical reference, including BIOS listings. Both decisions defined the platform.

Why it matters

Established the architecture that, with extensions, still runs most of the world's desktops, laptops, and servers forty years later. Made 'PC' the generic term for personal computer.