| Word | Description |
| Icon | An image that represents an object, folder or program, which launches the program when clicked. |
| Information system(s) | A collection of linked components used for the gathering, processing, storing, retrieval and manipulation of information in an organisation. |
| Information technology | Information technology (sometimes called IT) is a term that covers all forms of technology used to create, store, transmit, interpret and manipulate information in its various formats. |
| Internet | A worldwide, publicly accessible series of interconnected computer networks that transmit data by packet switching using the standard Internet Protocol (IP). It is a "network of networks" that consists of millions of smaller domestic, academic, business, and government networks, which together carry various information and services, such as electronic mail, online chat, file transfer, and the interlinked web pages and other resources of the World Wide Web (WWW). |
| Interoperability | The capability of software or hardware to operate interactively with other software or hardware without requiring special or additional technology. |
| Intranet | A network that uses the same kind of software as that used on the Internet, but is used by a company as a private network for internal use only. |
| IP (Internet Protocol) | The method of breaking streams of information up into packets that can be sent over a data network and reassembled at the destination. |
| IP address | The physical IP address that consists of 32 bits, which identifies a network and its connected computers. |
| IPTV | The delivery of television streams over an IP data network. |
| ISDN (Integrated Services Digital Network) | Provides digital data transfer over normal telephone lines and allows users to send and receive both voice and data transmission on the same line. |
| ISP (Internet service provider) | An organisation connected to the Internet that provides services such as Internet access, electronic mail accounts, and data storage to its customers. |