Introduction to computer :
Definition :
A computer is an electronic device that text input from its user store processes data and generates the required output us parda processing instructions given to eat by the user. The world computer comes from the world 'Compute' which means to calculate.
Computer is an electronic device which take input instructions from a user and help to process and store data into meaningful information output.
Personal Computer
It cannot itself think or reason a set of instruction that direct a computer to execute tasks is called a program and is writing by programmer. basically a computer performance 5 main function.
Input :
The processes of giving instructions and to feed raw data into the computer is called as input.
Processing :
Converging of raw data into meaning full information is called as processing which is in done by CPU central processing unit like numerical comparison, arithmetic operations etc.
Storage :
The data or information is storage into the memory of the computer, which is a part of the CPU is called storage.
Output :
Final result or meaningful information, which is generated after processing road data is called output. These result aur displayed by output device like monitor, printer etc.
Control :
The overall control from input to output, done by CU control unit is called as control functions of computer. Here see you is a part of the CPU Central Processing Unit.
Characteristics of Computer
A computer is equipped with number of cheap characteristics that helps it to handle the different problem more efficiently and economically. The salient characteristics are :
1. Speed :
Computer can process millions of instruction per second. It can also perform complex tax in fraction of second. The speed of the computer is increasing day by day. Many of 2 days computers can perform hundred of millions of processing operations in one second.
2. Accuracy :
the computer system always produce accurate or correct result only if the data entered by the user is correct or valid. Error can occur in a computer but they are generally due to human begins.
3. Versatility :
Versatility means, the computers can do a verity of jobs in depending upon the instruction feed to them or for the purpose they are used. A computer system can be used in railway, airport, school, college, University, bank and business etc.
4. Storage Capability :
A computer can storage large amount of information for long period on time. Today's computer or capable of storing more than one billion characters letter and numbers.
5. Diligence :
Computer can perform a given set of functions endlessly without getting period or bored.
6. Automation :
No woman intervention is required once the instruction and data are given. The CPU follows these instructions, until it meet at last instruction which says stop program execution.
7. Programmability :
A computer is programmability it means what the computer does depends on the program it is using ( A program is the list of instructions telling the computer what to do).