A computer-based information system (CBIS) is an information system that uses computer
technology to perform some or all of its intended tasks. Although not all information systems are
computerized, today most are. For this reason the term “information system” is typically used
synonymously with “computer-based information system.” The basic components of computer-based
information systems are listed below. The first four are called information technology
components. Figure 1.3 illustrates how these four components interact to form a CBIS.