Information technology (IT) consists of all the hardware and software that a firm needs to use in order to achieve its business objectives. Information systems are more complex. An information system can be defined technically as a set of interrelated components that collect (or retrieve), process, store, and distribute information to support decision making and control in an organization.The functions of an information system are to support decision making, coordination, and control; help employees analyze problems; help employees visualize complex subjects; and help create new products.