Evolution of computer or history of computer is most important topic for bank exam and ssc exam and other examinations.always 1 question ask from history of computer . so read this article and give right answer for upcoming exam .
1. WHAT : Abacus device
WHEN : before 3000 year
BY WHOM : lee kai chain abacus
DESCRIPTION : first calculating device of world. Only addition and subtraction function performed.
2. WHAT : Napier bones device
WHEN : in 1617
BY WHOM : john Napier
DESCRIPTION : first device for log function performed.
3. WHAT : Pascal device / pasc line / Pascal calculator
WHEN : in 1648
BY WHOM : blaise Pascal
DESCRIPTION : first mechanical device of world.
4. WHAT : stepped reckoning / reckoning device.
WHEN : in 1671
BY WHOM : lebniez
DESCRIPTION : first multiplication calculator.
5. WHAT : punch card device
WHEN : in 1809
BY WHOM : Herman Hollerith developer
Joseph marry jacquard idea of punch card
Description : input and output and storage device of computer
6. WHAT : difference engine device
WHEN :in 1822
BY WHOM : Charles Babbage
DESCRIPTION : calculating till 20 digit(no error )
7. WHAT : analytical engine
WHEN : in 1842
BY WHOM : Charles Babbage + Lady Augusta OR lady lovelac or ada king or hda Byron .(mother of computer)
DESCRIPTION : 4 functions performed. (Input and output and processing and storage)
8. WHAT : MARK -1ST
WHEN : IN 1937
BY WHOM : HOWARD A.AIKEN
DESCRIPTION : ELECTRO –MECHANICAL DECVICE.
9. WHAT : ABC (atansoff berry computer)
WHEN : IN 1939
BY WHOM : DR. JOHN ATANSOFF AND CLIFFFORD BERRY (INVENTOR + HIS ASSISTANT)
DESCRIPTION : BASIC MATHEMATICAL EQUATION SOLVED.
45 VACCUM TUBE FOR PROCESSING
CAPACITOR USED FOR STORAGE.