Computer
The word'computer ' is an old word that has changed its meaning several times in the last few centuries.The Techencyclopedia(2003) defines computer as " a general purpose machine that processes data according to a set of instructions that are stored internally either temorarily or permanently" Computer history
The trem history means past events.It indicates the gradual development of computers.Here we will discuss how this extraordinary machine has reached of it's apex.
In the begining...............................
The history of computers starts out about 2000 years ago, at the birth of the 'abacus' a wooden rack holding two horizontal wires with breads strung on them.Just like our present computer,abacus also considered a digit as a singal or codeo and processed the calculation.
Blasie Pascal ists usually credited to building the first digital computer in 1942.It added numbers to help his father.In 1671,Gottofried Wilhelm Von Leibniz invented a computer that was built in 1694.It could add,and, after changing somethings around,multiply.
Charles Babbage: A serious of very intersting developement in computer was started in Cambridge,England,by Charles Babbage, a mathmatics proffessor.In 1982,Babbge realized that many lng calculations,espically those need to make mathematical tabes ,were really a series of predictable actions that were constantly repated.From this he suspected that it should be possible to do these automatically.he began to design an automatic mechanical calcuting machine which is called a "difference engine"By 1822, he had a working model to domenstratere with. With financial help from the british goverment,Babbage started fabrication of a difference engine in 1823.It was intended to be steam powered and fully automatic including the printing of resulting tables,and commanded by a fixed instruction program.
Use o Punched Card By Hollerith: A step toward automated computing was the development of punched cards which were at first successfully used with computer by Herman Hollerith and James Power in 1890.They worked for the U.S Census Bureau,Devices were devoloped that could read the information that had been punched into cards automatically without any help from human.Becaus of this , reading errors were reduced dramatically,work flow increased,and,most importanly stacks of punched cards could be used as easily accessible memory of al most unlimited size.Furthermore,different problems could be stored on diffrent stcks of cards and accessed when needed.This advantages were sees by commerical compains and soon led to the development of improved punch-card using computrs created by International Business Machines(IBM).
Eletronic Digital Computers: In 1942,Jhon P.Eckert,Jhon W.Machly and their associates at the Moore school of Electrical Engineering of university of pennsylvania decided to build a high-speed electonic computer to do the job.This machine became known as ENIAC(Electrical Numerical Integrator And Calculator). The size of ENIAC's numerical"word" was 10 decimal digits and it could Multiply Two of these Numbers at a rate of 300 per second,by finding the value of each product from a multipication table stored in its memory.ENIAC was therefore about 1,000 times faster then the previous genaration of relay computers.
Mark1:

In 1944,Mark 1 computer was made with help of both participation by harvard university and I.B.M. Mark 1 was called as a full formed and organised computer at that time.
In the beginning of 20th century though vacunam vuld was invented ,the actual use of computer got started in1935.In 1939,Proffesor Jhon Atanasoff and his graduated cliff berry made a binary calculation based electronic computer through using VacuamTube andaccording to the name of inventions,they named it ABC(Atanasoff Berry Computer)
Jhon Von Neuman: Being inspired by the success of ENIAC,Moshly 3 Ekart started making a computer name EDVAC eith the help of money donetion in 1945.
It's EDVAC ehere the advantage of storing program and reporcessing stored program are given.this computer internal architect was Jhon von Neuman.This EDVAC was made concering Von NEumans proposals about the stored program and binary digit tecnique.Basing on his thinking,u U.S army made EDVAC.thats why jhon neuman is called the father of digital computer.
UNIVAC:

In 1949.under the super vision of proffesor Mavrice Wilkes ,EDSAC was made.On the other had in inventions of ENIAC and EDVAC started their projects to make UNIVAC(Universal Automatic Computer) in 1951
Univac was the first electronic computer whch was made for commercial bisiness for Remington company.In that decades some high level computer language such as FORTRAN and COBOL were intriduced.
In 1947,Trasistor was invented to replace vacuam Tube.Within the period of 1965 -1971, transistor was miniaturiz and placed on "silicon chips" called "semiconducators" in 1971.

Some important periods in the history of computer:
(1612-1614) :Logarithm introduced by jhon Nepiar.
1622 :Pied Rullar introduced by William Autred.
1623 :Gear based counting machine.
1822 :Disign of different Engine.
(1834-1843) :The first prorammer named Augusta Eda Biron.
(1904-1906) :Vacuam tube introduced.
1924 :The name of C.T.R. turned into I.B.M.
1937 :Binary circuit based on Bulean Algebra.
1956 :FORTRAN Complier. Transister based UNIVAC.
1958 :The invantion of COBOL language.
1965 :Transister based first minicomputer PDP-8.
1971 :First microprocessor called 4004 intoduced(intel).
1972 :Programing language C.
1976 :Introduced apple established by steve Jobes and stephen Uzniac.
1977 :Billgates and paul llen established Microsoft.
1979 : First sperad sheet program visicalc.
1983 : C++ Language intruduced.
1985 :windows 1.0 intoduced microsoft.
1988 :First computer virus.
2005 : Tecnology called Wi-fi, Youtube established.
2007 :O S Called MS Windows Vista gets started.
2008 :The journay of Wimax starts.
2009 :The revulation of soical networkings.
2012 : The third genaration ipad got annoucend. words and events are too many to describe the histories of computers.It has not stooped.peoople are wishing to get and more and more facilites provided our comfortable through solving complixities and proving itself as reliable one.