A computer is an electronic device used to perform operations at very high speed and accuracy. 

Following are the characteristics of the computer.

1. Speed: 

It can perform operations at a high speed.

2. Accuracy: 

It produces result at a high degree of accuracy. 

3. Diligence: 

Unlike human beings, a computer is free from monotony, tiredness, lack of concentration etc. We know that it is an electronic ma chine. Hence it can work four hours without making any errors. 

4. Versatility: 

It is capable of performing many tasks. It is useful in many fields. 

5. Power of Remembering: 

A computer consists of huge amount of memory. So it can store and recall any amount of information. Unlike human beings, it can store huge amount of data and can be retrieved when needed. 

Disadvantages of computer: 

1. No. IQ: 

It has no intelligent quotient. Hence they are slaves and human beings are the masters. It can’t take its own decisions.

2. No feelings: 

Since they are machines they have no feelings and instincts. They can perform tasks based upon the instructions given by the humans (programmers)