A computer is a device defined by its alphabet. In computers, the alphabet C means commonly, O means operated, M for a machine, P for particular, U means used, T means training, E for education, and R for research(ofgeeks). So, a computer is a commonly operated machine used for training, education, and research. The use of computers is very common in this century. Computers give many benefits or have many advantages as well as many disadvantages also. Describing below, first the advantages and then the disadvantages of computers.