Identifying the Computer

In the previous lesson you were made aware of the ways the computers are used in various means. The computer and its associated hardware are discussed in this article
What is a Computer?
The computer can be defined as an electronic machine which can input and save data and instructions, retrieve and process data which have been saved previously and display the processed data or information on the screen or print them. Accordingly, it can be understood that the computer is an electronic tool which
transforms data into information.
What is a Computer Program?
After studying this lesson, you will gain a clear understanding on:
Ø the main process of the computer
Ø the main parts of the computer
Ø architecture of the computer and its ports
Ø data communication
Ø computer networks
Ø internet
The hardware itself is not sufficient to work with the computer. Computer programes are to be installed in the computer to make it functioning. A computer program is a sequence of instructions written to perform a
specified task for a computer.

Special Features of the Computer
Various machines have been invented by man to transform data into information. Among them, the computer commands a vital role. Many reasons have influenced to gain this important position and given below are some of the main reasons.
Speed
The computer is a machine which operates very fast. A task or calculation which takes a long time to be completed through other means can be completed in a very short period using the computer.
Accuracy
The computer is a machine which operates with a very high rate of accuracy. If there is any error in the operation of the computer, such errors occur due to the errors of the given instructions and data. When preparing a program for the computer, it is a fundamental responsibility of the person who prepares the instructions to ensure the accuracy of it.
Efficiency
As it is a machine a computer which is installed in a suitable environment can be operated in the same speed continuously without any rest for any duration you need. This will not feel monotony, fatigue and loss of concentration as human beings.
Versatility
The ability to engage in a number of tasks is a special feature of the computer. Just after finishing one task, the computer can perform another completely different task with the same efficiency.
Storing and Retrieving
The data and information can be saved in the computer as long as we wish and it can be retrieved instantly when we need them. This is another special feature of a computer.
 No intelligence
Intelligent computers have not been created so far and all computers operate according to the commands or programs given by human beings.
No feelings
A computer is just another machine we use. Computers do not get feelings such as isolation, loneliness and exhaustion. Therefore, we can use computers to get our work done as we wish