EDVAC was started to be made by John Mauchly and John Presper Eckert before 1949 but completed in 1952. It used the binary Number system.
Electronic Numerical Integrator And Calculator (ENIAC)
In 1940s. ENIAC was developed by John Mauchly and John Presper Eckert. It used vacuum tubes as main component. It used the decimal number system.
Attansoff Berry Computer (ABC)
ABC was designed by John Von Attansoff and his student Clifford Berry in 1938. It also used vacuum tubes. It was faster then the previous Computers.
Mark 1
In 1937, the first computer was developed by Howard Aiken. The concept of charles Babbage was used in it. It was 51 feet long, 8 feet tall. It used 18000 vacuum tubes as the main component.
Charles Babbage
Charles Babbage invented the differential Engine in 1822 and the analytical Engine in 1833. His concept was similar to the present concept of modern computer. That why he is known as"Father of Computer Science".
Leibniz's Calculating Machine
Leibniz's Calculatin Machine was invented by Gottfried Wilhem von Leibniz in 1671. It was the first calculator that could perform automatic addition, subtraction, division and multiplication.
