History of Computer

Topics: Computer, Personal computer, Computer data storage Pages: 8 (1894 words) Published: July 3, 2013
HISTORY OF COMPUTER
Abacus-The First man-made computing device.
- It can perform addition and subtraction
- invented in China
Pascal’s calculating machine/Pascaline - The first mechanical calculator - Invented by Blaise Pascal
- Can perform addition & subtraction
Leibnitz calculator-First general-purpose calculating machine -Extended version of Pascal Calculating machine
-Can perform multiplication and Division
-Invented by Gottfried Leibnitz
Automatic weaving loom/1805-Invented by Joseph-Marie Jacquard -This device use punched cards to control weaving patterns
-The program contains programs for looms task
Babbages Difference & Analytical Engine/1822 & 1835-1869-Difference engine, can compute tables -Analytical engine, first general purpose computer, which is completely automatic and capable of calculating any mathematical problems -Invented by Charles Babbage

Punched card tabulators - The first use of punched cards to store data - Developed by Herman Hollerith
Mark 1-First general-purpose electromechanical computer at Harvard University -Developed by Howard Aiken, and known as MARK1 Digital computer - Can perform four basic arithmetic operation and stored the information in tabular form. ABC/1942-Atanasoff-Berry-Computer

-The first special-purpose digital computer that solves simultaneous equation -Develop by John Atanasoff
ENIAC/1946 - Electronic Numerical Integrator and Calculator. - The first fully electronic general-purpose digital computer. - Completed by John Eckert and John Mauchly.
BINAC/1949-Binary Automatic Computer)
-The first electronics stored program computer in the United States -Started operation
UNIVAC/1951-Universal Automatic Computer
-The first electronic computer to be commercially available and first to store data on a magnetic tape. -Was built Mauchly and Eckert
FORTRAN/1956 - Formula Translating System
- The first computer programming language
- Invented by John Backus and his team at IBM.
COBOL/1959-Common Business Oriented Language
-A computer language intended for business users
-Invented by Grace Murray Hooper
BASIC/1965-Beginners All-Purpose Symbolic Instruction Code -A computer language for beginners and used by owners of personal computers. -Develop by John Kemeny and Thomas Kurts
1967-Keyboards were used to provide data for computer.
1969 - ”bubble memory, devices were created for computers. - Such devices were designed to continue to “remember” even when the computer is turned off.
1970-The floppy disk was introduced for computer data storage. 1971-Pascal, a popular language used on home computers.
-Developed by Niklaus Wirth
DOS/1981-The IBM Personal Computer, introduced Disk Operating System. 1985/WOS-The Windows Operating System was introduced to become the most dominant graphical user interface (GUI) based operating system for personal computers. 1990 - Tim Berners-Lee proposed the hypertext system. - The start of the present Internet.

- Archie, from the word “archive,’ became the first search engine.
1994-Yahoo, the search engine was created by David Filo and Jerry Yang. -Yahoo is an acronym for “Yet Another Hierarchical Officious Oracle”. 1995-The first Wiki was created. A Wiki is an open and editable database such as Wikipedia. 1996-Google, the search engine, was developed by Sergey Brin and Larry Page. -Google would become the most dominant search engine on the internet.

Classification of Computer

Microcomputer
• also known as personal computer (PC)
• vary in size from small portable, such as palmtop (handheld) computers, notebook, and laptop computers that you can easily carry around.

Minicomputer
• also known as mid-size or mid-range computer
• similar to but small and less powerful than a...
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