Diplomo in Computer Applications (DCA) Computer Basics -3

History of Computers :
----------------------------
a) Around 3000 BC - Abacus by the Chinese
|
Systematic Calculation of Arithmetic operations.
No Conceptual changes were made until the end of 18th century.

b) 19th century - Jacquard - Invented
|
Automated loom operated by a mechanism controlled by punched cards.

During the same period - Charles Babbage
|
Developed Differential and analytical engine.
|
Provider for:- inputting data, storing information, performing
arithmetic operations and printing out results.
|
This provide - base - modern computer.

c) End of 19th century - Herman Hollerith & James Powots
|
Data processing machine for census informations.
Hollerith - Developed codes for processing both alphabetical and
numerical data.

d) In 1940s - A significant machine was Mark I - utilised -electromagnetic relays.

e)Later in 1940s - First electronic machine ENICA ( Electronic Numerical Integrator and
Calculator) was introduced

f) During 1946 - 52 - JhonVon Neumann and evis team developed
High-Speed digital computer - using vacuum tubes.