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COMPUTER GENERATIONS
After these early calculating machines, the present computer took its shape in five
generations.
First Generation (1940s)
There were many computers that were a part of the first generation computers.
MARK-I
In 1944, Prof. Howard Aikens built the first electro-mechanical powered computer
named Mark-I. It used punched cards and a typewriter for input and output. It
was 50 feet long, 8 feet high, weighed 5 tons, and could perform operations like
addition, subtraction, multiplication, division, and referring to previous results.
Mark-I was much more reliable than early electronic computers.
Mark-I
ENIAC
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. It had no internal storage and
required frequent maintenance.
Clickipedia
The first electronic computer
ENIAC weighed more than 27
tons and took up 1800 square
feet.
ENIAC
10 iPro (Ver. 4.1)-V

