The computer industry is one of the largest in western countries and especially in the USA. It includes companies that manufacture, sell and lease computers, as well as companies that supply products and services for people working with computers.
A computer cannot think. A human operator puts data into the computer and gives instructions. The operator writes instructions which determine the mathematical operations on information. A computer solves mathematical problems very rapidly. Traditionally, the computer in business is used to process data. This involves different administrative functions such as preparation of payrolls, inventory control in manufacturing, warehousing and distribution operations, customer accounting, billing by banks, insurance companies, public utilities and mass circulation magazines. Now the computer takes on new kinds of jobs. It has become more involved in business operations as an essential tool in making decisions at the highest administrative level.