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Chapter Profile
ENIAC— The First Electronic Computer
Electronic Numerical Integrator And Computer, was
the first electronic general purpose digital computer
built in 1946 by John Mauchly and Presper Eckert. It
contained over 18,000 vacuum tubes and was 1000
times faster than Mark-I. ENIAC consumed almost 200
kw of power.
ENIAC
UNIVAC
UNIVAC or Universal Automatic Computer, was
another successful invention of John Mauchly and
Presper Eckert in 1951, which could handle both
numeric and textual information.
The UNIVAC had 5200 vacuum tubes.
UNIVAC
Features of First Generation Computer
Huge in size.
Very expensive.
Made up of vacuum tubes.
Second Generation (1950s) Vacuum Tube
After 1955, use of transistors and magnetic tapes
changed the image of the electronic computer.
During this period, the major computer manufacturers
began to offer a range of accessories such as: Page Printers,
Cathode Ray-Tube display, Card Feeders, etc. Magnetic Tape
Features of Second Generation Computer
Made up of transistors.
Magnetic tapes were used to store data.
Small in size and less expensive than the first generation computer.
Faster and reliable. Transistor
Third Generation (1960s)
In the third generation, the invention of Integrated Circuits (IC)
led to smaller-sized computers with better functioning and more
storage. Integrated Circuits
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