Information Technology (IT) or Information and Communication Technology (ICT) is a broad subject which deals with technology and other aspects of managing and processing information, especially in large organizations; it can be considered a subdiscipline of computing. Particularly, IT is applied computing and employs the use of electronic computers, storage media, network administration, server maintenance, and computer software to secure, convert, store, protect, process, transmit, and retrieve information.
Computing is an umbrella term describing any goal-oriented activity requiring, benefiting from, or creating computers; subfields include Computer Science, Computer Engineering, Information Systems, Information Technology, and Software Engineering.
Computer networking is the scientific and engineering discipline concerned with communication between two or more computer systems - a computer network involving at least two devices capable of being networked with at least one usually being a general purpose computing platform such as a PC. The devices can be separated by a few meters and connected wirelessly (e.g. via Bluetooth) or thousands of kilometers and connected ultimately by terabit backbone networks (on the global Internet). Computer networking is considered a sub-discipline of telecommunications, and often also of computer science, information technology and computer engineering especially where these are concerned with parallel processing.