The importance of computer in present day scenario has proved computer a very useful and powerful tool. The power and usefulness of the computer is due to the following features. They are as under:

1. Automatic

A computer is said to be automatic because it works by itself without any human intervention and machine once started on a job, they carry on, until they are not stopped externally. Note: Computer being a machine cannot start by themselves and they need to start externally as well as they cannot sort their own problems and solutions rather, they need to be instructed.

2. Speed

A computer is a very powerful and fast device. It can perform huge amount of data in a fraction of seconds. Computer now a days are capable to store more instruction every second so that efficiency (speed) can be maintained. Today’s processors are multi-core GHz processors capable of processing over 100 billion instructions per second.

3. Accuracy

Computer being automatic and fast, said to be accurate also. The accuracy of a computer is consistently high. Computers can perform any task with same accuracy whenever it is demanded. It is very difficult for a human being to produce any task (output) with same accuracy and in identical manner when it is demanded for multiple times, the results may vary. However, for a particular computer, every calculation is performed with same accuracy.

4. Diligence

Dictionary meaning of diligence is: careful and persistent work or effort. Unlike human beings , a computer is free from monotony, tiredness and lack of concentration. Diligence is the property through which computer can work for hours, without giving any error and without any complain or question. Suppose if ten millions calculations have to performed even in night , a computer will perform the ten million calculations with exactly the same accuracy and speed as the first one, but it is not possible with human beings. With respect to time human being gets tired and need rest to continue for a long time but computer do not follow this property.

5. Versatility

Dictionary meaning of versatility is : ability to adapt or be adapted to many different functions or activities. Versatility is one of the most powerful thing about the computer. Versatility means one moment, it is preparing result of the students and at the other moment it is printing the excel sheet. Versatility feature of computer is used to implement multitasking.