THE COMPUTER

 INDRODUCTION-

1. THE ERA OF 20TH AND 21ST CENTURY HAS WITNESSED RAPID DEVOLPMENTS IN 

SCIENCE AND TECHNOLOGY IN INFLUENCING EVERY ASPECT OF LIFE.ONE OF THE GREATEST THINGS CREATED BY MAN IS "COMPUTER" .

  WHAT IS COMPUTER-

AN ELECTRONIC MACHINE THAT IS AN INFORMATION-PROCESSING AND INFORMATION-ACESSING TOOL.AND CALCUTING AMOUNTS AND CONTROL OTHER MACHINES.IS CALLED "COMPUTER".

WHO INVENT COMPUTER-

CHARLES BABBAGE,AN ENGLISH MECHANICAL ENGINEER .HE MAKE COMPUTER IN 1833.HE IS CALLED THE "FATHER OF COMPUTER".

GENERATION OF COMPUTER-

THERE ARE 5 GENERATION OF COMPUTER.

1.1940-52 

2.1952-64

3.1964-71

4.1971- ---

5.---

TYPES OF COMPUTER-

ACCORDING TO SIZE AND CAPACITY THESE ARE FOLLOWING TYPES OF COMPUTER-

1.MICRO COMPUTER-A MICRO COMPUTER IS SMALL,INEXPENSIVE .THIS COMPUTERS ARE USED BY INDIVISUALS,THUS ALSO CALLED AS PC OR PERSONAL COMPUTER

2.MINI COMPUTER-A MINI COMPUTER IS THIS COMPUTER IS COMPARATIVILY LAGER THAN THE MICRO COMPUTER.THIS IS CAPABLE OF RUNNING PROGRAMS IN A HIGHER LEVEL OF LANGUAGE.

3.MAIN FRAME COMPUTER-THESE ARE LARGE SIZED COMPUTERS.BY TIME SHARING AND MULTI TASKING TECHNIQUES MANY PEOPLE RATHER MORE THAN 100 PEOPLE CAN WORK AT A TIME ON DIFFRENT TERMINALS OF THIS COMPUTER.

4.SUPER COMPUTER-THESE ARE VERY POWERFUL COMPUTERS AND HAVE MORE STORAGE CAPACITY.THESE ARE MOST EXPENSIVE AND FASTEST COMPUTER,ABLE TO PROCESS MOST COMPLEX JOBS WITH A VERY HIGH SPEED.

5.QUANTUM COMPUTER-THE DEVELOPMENT OF THIS TYPE IS IN FINAL STAGE . PROBABLY QUANTUM COMPUTERS WILL BE MORE ADVANCED THAN THE HUMAN BRAIN.IN QUANTUM COMPUTERS Q-BIT WILL BE USED IN LIEU OF BINARY BITS.

HARDWARE-

A COMPUTER HAS 3 MAIN UNIT 

1.INPUT UNIT

2.PROCESSING UNIT

3.OUTPUT UNIT

THESE ARE THE PHYSICAL UNITS OF A COMPUTER SYSTEM.THESE UNITS .

SOFTWARE-

SOFTWARE RELATES TO SET OF PROGRAMS. THE SOFTWARE IS A GENERAL TERM USED FOR ALL COMPUTER PROGRAM.

CPU

THE CPU IS THE PART OF A COMPUTER THAT PERFORMS THE MAIN FUNCTION OF INFORMATION PROCESSING.THE MEMORY STORES DATA.THE COMPUTER SUPPLIES PROCESSED INFORMATION BACK TO THE USER USING SPECIAL OUTPUT DEVICES.

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