To elaborate the Definition of Computer first need to know the origin of the word computer. The ”Computer”, word came from Latin word “Compute”. The computer is an electromechanical device which can accept data from external sources, a process through them in CPU & the processed data give us through output device. The computer allows data, we known as this device is an Input device. Like as- Key Board, Mouse, DVD-ROM, scanner, Joysticks, Touch Screen, Voice Input, Audio Input, WEB Cams, Digital Camera etc. The computer gives result or processed data, we known as these devices are an output device. Like as- Monitor, Sound box, Printer, Video Card, Dot-Matrix, etc.
We can store data, information, and instruction for the use in future. The example of storage devices is- Floppy Disk, Hard Disk, External Hard Disk, Smart Card, Pen Drive, Cloud Storage, CD-ROM, DVD-ROM, etc.
The route of a computer is “Abacus.”
Abacus: – It is a first counting device in the world or one type of calculation method. This process first used by Chinese before five thousand years ago. The same kind of device used by Japan, it was called ” Saroyan .“
“Charles Babbage“ is known as the father of the computer.
He was a math professor at Cambridge University. He invents “Differential Engine” (one type of counting device) in 1822. In 1833 he modified this machine by a sum, subtract, multiply, division, rote & percentage and build “Analytical Engine .“
In 1944 the scientist Hardwood A. Incan invents self the electromechanical computer, known as “Mark-I.” It had 3000 switches & take 0.3 seconds for any summation & 4.5 seconds for any subtraction.
More on Definition of Computer:-
Who is the Inventor of New Computer?
“John Von Neumann” is known as the inventor of the new computer. John Von Neumann invents ‘EDVAC’ in 1952. The Binary Number System has first used in this Computer (EDVAC).
The Full Form of Computer
We are using computer in different fields of works but the computer’s every letters have their own meaning. So with the Definition of Computer, it is essential to know about the letters of computers. The full form of computer is below-
Generation of Computer
First Generation- (1945-1955), used Vacuum tubes.
Second Generation- (1956-1964), used Transistors.
Third Generation- (1965-1975), used Integrated circuits.
Fourth Generation- (1975-1984), used Chips.
Fifth Generation- (1985- now), same as Fourth Generation.
The Function of Computer
The role of computer can be divided into four flowing categories-
- ACCEPTION DATA
- RETRIEVING DATA
Advantages of Computer
The benefits of computer are given below-
Disadvantages of Computer
The problems of network are provided below-
- Lack of intelligence
- Need suitable environment
- Need non-fluctuating power
- Need to learn particular language
Classification of Computers
Nowadays computer is a very essential gadget for everyone in different kinds of field. Generally computers have some abilities to store various types of program files & application and it also can help us to do some hard work in single moment. So, it is used in various areas of works. That is why, we can classify computer depending on their performances and speed. According to their uses and their performances computers are classified into three types. Classification of Computers :
- Analog Computer
- Digital Computer
- Hybrid Computer
- Then the Digital Computers are also divided into four types. They are–
- Micro Computer
- Mini Computer
- Main Frame Computer
- Super Computer
- The Micro Computers are also divided into three categories. They are–
- Note Book
@ Classification of Computers
An Analog computer works by measuring rather than counting the process. Analog computers are not easy to use. They are used for especially scientific and engineering application. Like as- Measuring the up and down of the electric voltage.
Example- Slid rule.
Digital computers work with digits. In other word a digital computer is a counting device. Computers are known as two numbers 1 and 0. The meaning of 1 is ‘ON’ and 0 is ‘OFF’. These computers are general in use. Digital computer is much faster than Analog computer. Digital computers are used for word processing, work shop, office, school, college etc.
Features of Digital Computer:
1) These computers work on depending on ‘Mathematical and Logical.’
2) This type of computers understands the ‘Machine Language.’
The hybrid computer is one type of computer which combines both the features of Analog and Digital computer. The speed of a Hybrid computer is very fast. It is mostly used in the fields of Hospital. Hybrid computers measure Heart Beat and Blood Pressure.
Example: Micro- Robot is one type of Hybrid computer.
Micro Compa micro
The computer is at the lowest end of the computer range. Micro-processor used in these computers for Central Processing Unit. It is also called PC (Personal Computer).
Features of Micro Computer:
1) The lowest end of the computer range.
2) Smaller than another computer.
3) Small memory capacity from another computer.
Uses of Micro Computer:
These computers are also used in the field of Teaching, Accounting, and entertainment.
The mini computer performs better, large and costs more than Micro Computer. The Mini Computer is a computer whose processing speed is also many time faster than Micro Computer. Multi processing and Multi-user are used in Mini computers.
Features of Mini Computer:
1) Costly machine than a Micro computer.
2) These computers are used in Computer Aided Design (CAD).
3) It is a multi-user computer.
Uses of Mini Computer:
This computer used in the field any production unit laboratories.
Main Frame Computer
Main Frame computer is faster, more powerful and more sufficient than Mini Computer. They are operated at very high speed, have very large storage capacity and support more than hundred of users at a time from a different location.
Features of Main Frame Computer:
1) Very large size. Like as a room.
2) This computer works with large storage information.
Uses of Main Frame Computer:
Air and Railway service.
Super computer is the faster, most costly machine and it considered a national resource. The first Super Computer in India is PARAM 2000.
Features of Super Computer:
1) High speed and self-dependent.
2) This computer work with PICO second.
3) More than one processor used on this computer.
Uses of Super Computer:
This computer is used in the fields of Weapons design, Space Research, Atomic research, etc.