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Computers can no longer be termed as a mere invention-it is a Revolution.We Cannot Imagine our World without Computers today. There is no Area,which is untouched by Computers.See for yourself, be it the field of Medicine,commercial services like Bank,Education, we see computers everywhere.And Thus knowledge of Computers is Must for Eveyone.This Website is Designed with the Dual Objectives in mind,
one, to make people computer literate and two, to provide Additional details that will help you prepare for a career in this area.
Computers have made Great inroads in our everyday Life and Thinking.
They are put to use for all sorts of applications ranging from complex calculations in the field or frontline research,engineering simulations down to teaching,printing books and recreational games.The ease with which computers can process data,store and retrieve it painlessly have made them inevitable in office and business environments.The knowledge and information in this Website is the result of a concerted effort of the Computer Careers Team, which is continuously striving to bring you the best and latest in Information Technology.
History of Computing
The word Computer comes from the word “Compute” which means “to calculate”.Thereby,A Computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
EVOLUTION OF COMPUTERS
- Blaise Pascal invented the first mechanical adding machine in 1642. It was the first machine to better human performance of arithmetical computations. and would turn out to be the only functional mechanical calculator in the 17th century.Two hundred years later in 1851
- Baron Gottfried Wilhelm von Leibniz invented first calculator for multiplication in 1671.
- Keyboard machines originated in the United States around 1880.
- Charles babbage is considered to be the father of modern digital computers.He is designed “Difference Engine” in 1822,fully automatic analytical engine in 1842 for performing basic arithmatic functions
FIRST PROGRAMMABLE COMPUTER
The Z1 originally created by Germany’s Konrad Zuse in his parents living room in 1936 to 1938 is considered to be the first electrical binary programmable computer.
FIRST DIGITAL COMPUTER
Short for Atanasoff-Berry Computer,the ABC started being developed by Professor John Vincent Atanasoff and graduate student Cliff Berry in 1937 and continued to be developed untill 1942 at the lowa State College (now low State University).On October 19, 1973,US Federal Judge Earl R. Larson signed his decision that the ENIAC patent by Eckert and Mauchly was invalid and named Atanasoff the inventor of the electronic digital computer.
The ENIAC was invented by J.Presper Eckert and John Mauchly at the University of Pennsylvania and began construction in 1943 and was not completed untill 1946.It occupied about 1,800 square feet and used about 18,000 vaccuum tubes,weighing almost 50 tons.Although the Judge ruled that the ABC computer was the first digital computer many still consider the ENIAC to be the first digital computer.
However,because the ABC was never fully functional we consider the first functional digital computer to be the ENIAC.
THE FIRST STORED PROGRAM COMPUTER
The early British computer known as the EDSAC is considered to be the first stored program electronic computer.The Computer performed its first calculation on May 6,1949 and was the computer that ran the first graphical computer game.
THE FIRST PERSONAL COMPUTER
In 1975 Ed Roberts coined the team personal computer when he introduced the Altair 8800.Although the first personal computer is considered to be the kenback-1,which was first introduced for $750 in 1971.The computer relied on a series of switches for inputting data and output data by turning on and off a seried off lights.
The Micral is considered to be the first commercial non-assembly computer.The computer used the Intel 8008 processor and sold for $1,750 in 1973.
THE FIRST WORKSTATION
Although never sold the first workstation is considered to be the Xerox Alto, introduced in 1974.The computer was revolutionary for its time and included a fullt functional computer,display, and mouse.The Computer operated like many computers today utilizing Windows,Menus,and Icons as an interface to its operating systems.
THE FIRST LAPTOP OR PORTABLE COMPUTER
The first portable computer is considered to be the Osborne I,a portable computer developed by Adam Osborne that weighed 24 poundsm a 5 inch display, 64 KB of memory, two 5 1/4 floppy drives and a modem.IBM PCD released the IBM portable in 1984 and later ThinkPad 775CD, the first notebook with an integrated CD-ROM.