HISTORY OF COMPUTERS

HISTORY OF COMPUTERS

1. 3000 BC the ABACUS a rudimentary first computing device developed. 
2. 1642 – Blaise Pascal built the first mechanical digital calculator Pascaline.
3. 1822 –  Charles Babbage invented Difference Engine with a mechanical memory to store results.
4. 1840 –  Ada, the first programmer suggested binary  Data storage rather than decimal.
5.  1880 –  Dr.Herman Hollerith developed the punched card that would contain data coded in form of punched holes.
6. 1939 – Dr. John Vincent Atanasoft produced the first prototype electronic computer.
7. 1944 – Aitken built Mark 1 the first automatic, sequence controlled calculator; used by military to compute ballistic data.
8. 1947 – Mauchy and Eckert built ENIAC – 2nd Electronic digital computer.
9. 1949 –  Maurice, Eckert and Von Neumann built EDVAC the -1st stored program computer.
10. 1950 – Turing built Ace – 1st programmable computer.
11. 1951 – Mauchy and Eckert built UNIVAC 1 – 1st commercially sold.
12.  1960 – Gene Amdahl designed IBM System/360 mainframe computer – 1st general purpose digital using Integrated circuits.
13.  1963 – Olsen with Digital Equipment Corporation  produced PDP-1 – 1st Mini computer.
14. Ted Hoff of Intel Corporation produced microprocessor Intel 4004.
15. 1975 – H.Edward Roberts – 1st Microcomputer.
16.  1976 – Seymour Cray CRAY-1 Supercomputer.
17. 1977 – Stephen Wonzniak and Steven Jobs built first  Apple Microcomputer.
18.  1980 – Lower cost Personal Computers.