|1. Information technology refers to any technological infrastructure within the organisation that deals with the processing and storage of information via sophisticated computer programs.
2. Information technology is composed of several related parts. One includes techniques for processing large amounts of information rapidly, and it is epitomized by the high-speed computer. A second part centers around the application of statistical and mathematical methods to decision-making problems; it is represented by techniques like mathematical programing, and by methodologies like operations research. A third part is in the offing, though its applications have not yet emerged very clearly; it consists of the simulation of higher-order thinking through computer programs.
Source: (Leavitt & Whisler, 1958)
3. Information technology, or IT, describes any technology that powers or enables the storage, processing and information flow within an organization. Anything involved with computers, software, networks, intranets, Web sites, servers, databases and telecommunications falls under the IT umbrella.
Source: (Roos, 2007)