What is computer?

What is a computer, its characteristics, history,defination.

computer has become an important part in our life.it is used daily from school to office. an computer is being used a lot in homes to handle daily work.
 

so we all should introduce computers well.only then can we succeed in using this electronic device properly.in addiction, importance questions related to computers also asked in competitions.Due to this,it is necessary to have basic knowledge of computer. 

What is computer?

A computer is an electronic device that processes the data inputted by the user and provides information in the form of results.

 Simply put, a computer is a type of electronic machine that processes the data, accepting the instructions given by the user.

How many types of computers?

1 Analog Computer

2 Digital computer

3 Super computer 

4 Hybrid computer 

5 Mini computer

6 Mainframe computer

7 Micro or personal computer

Uses of Computer?

1. Computer At Home 

Use of computers in homes is now common. Today everyone wants to get it. Computers have changed the way we work. The computer alone makes the work fast and accurate for the first eight people.

We can prepare the budget of our house through computer. On the computer, we can listen to songs, download videos, watch movies. You can talk to your friends.

 You can also write letters to your distant relatives, friends and visitors. We can also play games on computer. Apart from this, we can deal with the work of our office from the computer only. 

2. Computer in education

The use of computers in education has led to a revolution in this field.  We can read from the computer while sitting at home.

 Studying on computer through internet is called online study.

 You can get information about thousands of colleges, universities and courses, with just one click, and also get admission.  Nowadays, examinations are also being conducted through this.  People are also trained by computer.

3. Computer in business

Computer usage is starting to be very high in the business sector. Today, there will be an office in which the computer is not used. With the use of computer, the way of doing business has changed completely.

 Today, you can manage your business from anywhere through the computer. The use of this electronic machine has increased the speed of work in the office.

 You can create and compile records, production, sales details, stock etc. of your employees by computer. Therefore computers are used in offices.

4. Computer in engineering

Scientist is the oldest friend of computer. Computer is being used only by its invention in the field of science and technology. Therefore, the field of science and technology is also not untouched by this.

 These people use computers to share information with each other. They also complete their research work through this.

 Engineers also easily complete their complex equations and designs in a matter of minutes by computer. Contribution of computer in areas like weather forecasting, transportation operations, space, geography etc. Is incomparable.

5. Computer in sports

With the use of computer in games, games can be operated quickly and uninterrupted. Through this, records of players, their historical moments, scorecards etc. can be made. Accuracy in decisions comes from using a computer to make decisions in any game.

6. computer in government

Actually, there is no area left where computer is not used. Therefore, wherever you go, you will be able to use the computer. Apart from the areas mentioned above, there are thousands of areas which have accepted the importance of computer and are gradually incorporating it.

7. Computer in Defence

Computers have been used in the defense sector since the beginning. But today its meaning has completely changed. Large missiles, nuclear weapons, satellite can be controlled by just one command. New weapon designs are made by Computer. Records of soldiers, criminals and weapons are made.

                   Parts of computers

 There are five parts of computers.

1.MONITOR

A monitor is an electronic visual computer display that includes a screen, circuitry and the case in which that circuitry is enclosed. Older computer monitors made use of cathode ray tubes (CRT), which made them large, heavy and inefficient. ... Amonitor is also known as a screen or a visual display unit (VDU). 

2. CPU

Cpu is a central processing unit is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output operations specified by the instructions. Components of  a cpu. The two typical components of  a cpu include the following . The arithmetic logic unit (Alu) which performs arithmetic and logical operations. The control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary.

3. KEYBOARD

A keyboard is one of the primary input device used with a computer, Similar to an electric typewriter, A keyboard is composed of button used to create letters, number, and symbols, and perform additional functions.

4 . MOUSE

A mouse is used to input data by sending a signal to the computer based on hovering the cursor and selecting with the left mouse button.

5. SPEAKER

Speakers are one of the most common output devices used with computer systems. Some speakers are designed to work specifically with computers, while others can be hooked up to any tyoe of sound system. Regardless of their design, the purpose of speakers is to produce audio output that can be heard by the listener.

    Who made the first computer? 

Who invented the computer? There is no straightforward answer to this question because the computer does not represent a single machine but it is a collection of many different types of mechanical parts.

 At the same time, these parts have been invented by different people at different times.  Therefore, the answer to this question depends on the classification of the computer.

 Who discovered computer and when (evolution)?

Computer was invented in the 19th century by Charles Babbage Salt, a famous Mathematics professor. Therefore, he is also called Father of Computer.

 He designed an Analytical Engine (first mechanical computer) which was the successor of Difference Engine (automatic mechanical calculator) and is considered to be the basic framework of modern computers today.

 These were classified into Generations and each generation was a much improved and modified version than its previous generation.

 In 1822, the British mathematician and inventor charles babbage (1791–1871) created the first steam-powered automatic mechanical calculator, which he named "Difference Engine" or "Differential Engine".