Complete History and Generations of Computers from beginning to now., Study notes of Computer Science

Download Complete History and Generations of Computers from beginning to now. and more Study notes Computer Science in PDF only on Docsity! Topic: Complete History of Computers Detailed Knowledge Of History Of Computers University of Education Dera Ghazi Khan Campus, Punjab, Pakistan. HISTORY OF COMPUTERS Tally Stick: Tally stick was an ancient memory aid device to record and document numbers quantities or even messages. Abacus:  An abacus is a mechanical device used to aid an individual in performing mathematical calculations.  Abacus was invented in Babylonia in 2400 BC.  The bakers in the form we are most familiar with were first used in China in around 500 BC.  It used to perform basic arithmetic operations. Napier Bones:  Invented by John Napier per in 1614.  Allowed the operator to multiply divide and calculate square and cube roots by moving the roads around and placing them in specially constructed boards. Pascaline:  Invented by Blaise Pascal in 1642.  It was its limitation to addition and subtraction.  It is too expensive. Arithmometer:  Mechanical calculator invented by Thomas the de Colmar in 1820.  The first reliable useful and commercially successful calculating machine.  The machine could perform the four basic mathematics functions.  The first mass produced calculating machine. First Computer Program:  In 1840 Augusta Ada Byron suggest to Babbage that he use the binary system.  She writes program for the analytical engine. Scheutzian Calculation Engine:  Invented by per George scheutz in 1843.  Best on Charles Babbage difference engine.  The first printing calculator. Z1:  The first program able computer.  Created by Konrad Zuse in Germany from 1936 to 1938.  The program does it won required that the user insert one step into a punch tab reader and all output was also generated through punch type. ENIAC:  ENIAC stand for electronic numerical integrated and computer.  It was the first electronic general purpose computer.  Completed in 1946.  Developed by John Presper Eckert and John Mauchly. The First Portable Computer:  Osborne 1-the first portable computer.  Released in 1981 by the Osborne computer corporation. COMPUTER GENERATIONS