information technology Information technology (IT) includes all technical means to process or transmit information. Processing information includes the collecting, recording, using, storing, transmitting, software-driven processing, in-house presentation and disclosure of information. information-technology system An information-technology system (IT system) is a technical system to process information which constitutes a complete functional unit. Typical IT systems are servers, clients, stand-alone computers, mobile telephones, routers, switches and security gateways. IT security IT security (also known as information security) means the fact that the authenticity, confidentiality, integrity and availability of an information-technology system and the data processed and stored in it are intact. 36