
6
C3
D. Implementation
Overview of Personal Computer
1. Evolution of personal computers
About 1300
The more familiar wire-and-bead abacus replaces the Chinese calculating rods.
It is the first calculator.
1935
IBM introduces not only the 601 multiplying punch-card machine but also an
electric typewriter.
1943
In December, Colossus, a British vacuum tube computer, becomes operational
at Bletchley Park trough the combined efforts of Alan Turing, Tommy Flowers,
and M.H.A Newman. It is considered the first all-electronic calculating device.
1945
J.Presper Eckert and John Mauchly sign a contract to build the EDVAC
(Electronic Discrete Variable Automatic Computer).
1975
The first PC, an Altair 8800, available as a kit, appears on the cover Popular
Electronics in January.
1976
Steve Jobs and Steve Wozniak design and build the Apple I, which consists
mostly of a circuit board.
1980
IBM selects PC-DOS from upstart Microsoft as the operating system for its
new PC.
1983
The IBM PC-XT heads for market success, while the PC Junior faces quick
extinction.
1985
With the development of Windows 1.0, Microsoft brings Macintosh-like
features to DOS-compatible computers.
1993
Intel's Pentium is introduced in March.
1995
Windows 95 is launched on August 24 with great fanfare.
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