Icon -- small graphical image that represents a program or file stored on the computer.

Integrated Services Digital Network (ISDN) -- this is a digital line that is often used to connect to the Internet. It is a way to move more data over existing regular phone lines. ISDN is becoming available across the USA and is often priced very comparably to standard analog phone circuits. It can provide speeds of about 128,000 bits-per-second over regular phone lines. The channels can be used in various ways to carry voice, video and data simultaneously.

Interface -- a connection point that allows for interaction between computer hardware and/or software. It is also the access point for an application.

Internet -- a "network of networks" that links computers around the world. These computers range from personal computers to supercomputers, and they all use a set of rules called TCP/IP to exchange information.

Internet Explorer -- an application commonly used to provide access to the Internet.

Internet Protocol Number (IP Number) -- a unique number consisting of four parts separated by dots, e.g. 165.113.245.2. The specific network address of a computer connected to the Internet.

Internet Service Providers (ISPs, also called local access providers) -- companies that have direct Internet connection and allow subscribers to establish accounts and pay a monthly fee to use their connections. Examples are AOL, Microsoft, Hotmail, Earthlink, Yahoo and others.

Intranet -- a private network inside a company or organization that uses the same kinds of software one would find on the public Internet, but restricted for internal use.