Components of Computer

 Computer:

Computer is an eclectric machine that work according to given instructions. The Instructions are known as program. 

Computer is an electric machine that uses input data to generate useful information as out put according to given instructions. 

Program:

Program is a set of instructions that given to the computer to accomplish a specific task. The person who write or give the instructions to the computer is know as programmer. 

Programmer:

 A person who developed a program is known as programmer. He is the man who investigate the actual problem and check the all solutions and finally use a best solution. A programmer write programs according to the needs and entertainment. A lot of programmer write programs to enhance business where as some programmer used to write programs for just entertainment and time pass like games etc. 

Components of Computer:

There are two major components of the  computer

1: Hardware    2:  Software

1: Hardware

Hardware are those part of computer which we can see and touch. Inshort hardware has physically mass and weight. It is the only way to give and receive date from computer. Hardware are Mouse, keyboard, monitor, system box, mic, speaker, printer etc. 

2: Software

Software is the set of instructions that are given to the computer to perform a specific task. It can be designed by individual or the group of programmers. There are two main types of software

1: System software    2: Application software

1: System software

System software are the software that control the overall activity of a system. It is necessary for every system. Every system must have at least one system software like window etc. System software are cheap than application software cuz it designed for publicly not for a specific organization. 

2: Application software

Application softwares are the software that are designed for a specific organization or person. It is expensive than system software cuz it is designed for a specific person or organization like library management software etc. 

How to write a programme

A programme is written by a an expert person who known as programmer. Programmer write programme using specific symbols and words. The set of these special symbols and words is known as programing language. A program can be written in high level language and low level language. 

High level language

The programing languages that are nearer to the human intellect and far from computer intellect. High level languages uses words like English language like print breack etc. The program written in high level language is known as source program before compiling. It is mostly uses to develop a application software.The computer can't understand source program directly that's why it  usese language translators. There are three main language translators are 1: Compiler  2: interpreter  and 3: Assembler. They all have different uses. 

Low level language

The programing languages that are nearer to computer and far from human intellect is known as low level languages. The computer can understand and run a programme directly if it is written in low level languages. It is mostly uses to develop a system software. It is very hard to write a program using low level languages. It consists on binary numbers that are the native language of computer. The programme in low level language is known as object code. 

Mouse:

Mouse is an input device that is used to input data. It is the most common input device and make process faster to give in put. In the early days of computer uses a wired mouse that contains two button and one scroll wheel. Left button used to open a file and right click used to show properties of file. With the passage of time computer get a new version of mouse that are wirelessand it makes more comfortable and easy to work. With the passage of time computer get a new version of mouse that are touch pad built on the system that's make more friendly environment for the users. 

Keyboard

Keyboard is an input device that is used to input some data like symbols and words. Specially it is used to input instructions. It is the set of different buttons that are connected to the system throw a wire. Keyboard also have wireless and touchpad version. Most of keyboards are developed according to the QWERTY  or  DWORAK layout. 

Monitor

Monitor is an out put device that are used to  show out on the screen. With out monitor it is  very difficult could be impossible to work with computer. Monitor shows us the input output and processing process. It is not wrong to say that monitor guide a average user to use the computer. In the early days monitor has only two colors black and white that are not good to present anything. But with the passage of time monitor get it's new version that has three light color beans that contain blue ,yellow and red color. Now we can present our project or video  in multi colors. With the help of these three beans monitor can generate any color. Day after day monitor reducing its weight and improving its design. 

System box:

System box is the main component of the computer. It contains motherboard CPU power supply etc. CPU stand for central processing unit. CPU is know as the brain of computer. All the the activities controlled by CPU and it is built on motherboard. All the other components of computer directly or indirectly connected to the motherboard.