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.
