Speed: Computer is a very fast device. Some calculation that would have taken hours and days to complete otherwise, can be completed in a few seconds using the computer. It can carry out instructions at a very high speed obediently, uncritically and without exhibiting any emotions.

Accuracy: The degree o accuracy o computer is consistently very high and every calculation is performed with the same accuracy. The accuracy level of a particular computer is determined on the basis instructions and the design of computer.

Storage: The computers have lot of storage devices which can store a tremendous amount o data with appropriate format. Data storage is essential function of the computer. Secondly storage devices like compact disk can store a large amount of data permanently

Reliability: Computer provides very high speed accompanied by an equally high level or reliability. Thus, computers never make mistakes on their own accord.

No feeling : It does not have feelings or emotion, taste, knowledge and experience thus, it does not get tired even after long hours of work.