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Osborne 1

Osborne · 1981

The first commercially successful portable computer: a complete CP/M machine with two drives and a five-inch screen in a sewing-machine case, bundled with more software than it cost. Adam Osborne then announced its successor early, sales of this stopped dead, and the company failed — the origin of the phrase "the Osborne effect".

As catalogued

Maker
Osborne
CPU
Zilog Z80A-4
Memory
64K
Styles
Osborne 1 (tan), Osborne 1 (blue), Osborne 1A
Regions
US, PAL (Europe)
Chassis
sewing-machine luggable with a 5-inch screen and two drives
OS
CP/M 2.2

Chips

2
CPU
Zilog Z80A, Zilog Z8400AB1, NEC D780C-1, SGS Z8400AB1, Sharp LH0080A, Mostek MK3880N-4, GoldStar Z8400A, Toshiba TMPZ84C00AP
Floppy controller
WD1793, Fujitsu MB8877

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