Electronic Numerical Integrator and Computer

• Electronic Numerical Integrator

• and Computer

• The world’s first eletronic digital

• computer

It was conceived and designed by John William Mauchly and J. Presper Eckert of the University of Pennsylania

• It was conceived and designed by John William Mauchly and J. Presper Eckert of the University of Pennsylania

• weighed thirty tons, and consumed two hundred kilowatts of power

• Vacuum tube, over 19,000 of them

• fifteen hundred relays and hundreds of thousands of resistors, capacitors, and inductor

• They were arranged in a "U" shape, with three panels on wheels

• An IBM card and card punch

The function of the machine was split into eight basic circuit components :

• The function of the machine was split into eight basic circuit components :

• - the accumulator - buffer

• - initiator - gate

• - master programmer

• - multiplier, divider/square-root

• - function tables

• The ENIAC was programmed by wiring cable connections and setting three thousand switch on the table

• Another drawback on the machine was a side effect of its reliance on vacuum tubes, which tended to burn out very often

• Construction of the ENIAC was completed in the fall of 1945

Its very first application as to solve atomic enery problems for the

• Its very first application as to solve atomic enery problems for the

• Manhattan Project

• Result of works in the first year

• compute ballistic trajectories
• weather prediction
• cosmic ray studies in astronomy
• random number studies
• Designing wind tunnel

The machine was conceived in 1937 by Dr.Atanasoff and Clifford E.Berry.

• The machine was conceived in 1937 by Dr.Atanasoff and Clifford E.Berry.

The ABC innovation included electronic computation, binary arithmetic, parallel processing, regenerative memory, and separation of memory and computing functions.

• The ABC innovation included electronic computation, binary arithmetic, parallel processing, regenerative memory, and separation of memory and computing functions.

• Using binary digits

• Performing all calculations using electronics

• Computation and memory are separated.

The ABC was designed for a specific purpose, the solution of systems of simultaneous linear equations.

• The ABC was designed for a specific purpose, the solution of systems of simultaneous linear equations.