First Generation Computers


Vacuum Tubes



ENIAC (Electronic Numerical Integrator And Calculator)



UNIVAC (Universal Automatic Computer)


First Generation Computers:

The first electronic computer was developed in 1946 it is called Electronic Numerical Integrator And Calculator (ENIAC). It consists high speed vacuum tube, switching devices. In 1946 computer programming was mainly done in Machine language. 1951 Assembly language was invented. These computers were large in size and writing programs on them was difficult. First Generation computers are designed based on vacuum tube technology. The computers were large and accurate with high power requirement and large amount of heat generated.

ENIAC: It was the first electronic computer built in 1946. It was named Electronic Numerical Integrator and Calculator (ENIAC).

EDVAC: It stands for Electronic Discrete Variable Automatic Computer and was developed in 1950. The concept of storing data and instructions inside the computer was introduced here. This allowed much faster operation since the computer had rapid access to both data and instructions.

EDSAC: It stands for Electronic Delay Storage Automatic Computer and was developed by M.V. Wilkes at Cambridge University in 1949. The first and full size stored program computer, built at the University of Cambridge

UNIVAC: Dr. Presper Eckert and Dr. John Mauchly, the team that invented the UNIVAC.
Ecker and Mauchly produced it in 1951 by Universal Automatic Computer setup.


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