Man firstly used his fingers or toes as counting ads. in the beginning many devices have been used in the processing of data. the information given below describe the how computers were evolved.
Year 3000 BC - Abacus
Developed in China used as a counting device and later on for mathematical calculations.
1620 AD - Slide Rule
Normally used for engineering calculations.
1642 - Pascal's Machine
It was developed by the scientist blaise Pascal it was made for tedious mathematics calculations. it was not very successful due to difficult operation and very high cost.
1834 - Babbage s Analytical Engine
Today's Computer organisation corresponds very closely to an analytical engine. It was developed by Charles Babbage who was an English mathematician. The Charles Babbage is known as the father of computer.
1842 - First Computer Programmer
Lady augusta Ada Byron translated paper on Babbage's analytical engine discribing step to follow for using it. Aap program language ADA is named after her.
1854 - Boolean Logical (Algebra)
George boole published the principal of Boolean logi. It was an important development in the field of computer us it become easy to build reliable electronic circuits representing binary digits - 1 for ON and for OFF.
1884 - Punched Card Tabulating Machine
It was developed by Dr Harman hollirth. It was used for us cencus. The device was capable of completing the work writing 2 years.
1944 - Howard Mark - 1
It was the first successful general purpose digital computer.
1946 - Concept of Program VS Data
Dr. John have suggested the concept of stored programmes to make computers fully automatic.
1946 - ENIAC
It stands for electronic numeric integrator and calculator developed at USA. it was a full fledged electronic computer.
1951 - Univac -1
It stands for universal accounting company. it was developed for commercial data processing. it was used by Columbia broadcasting system CBS for forecasting the USA presidential election results in 1952.