The following glossary defines 290 terms related to the IT Industry.  
Please do not reproduce without permission.

ICSA-Certified

ICSA Labs is the security industry's central anti-virus product testing and certification facility. Here, you will always find which products are currently certified along with detailed lab reports of the tests that are conducted.

IEEE

(Institute of Electrical and Electronics Engineers). Organization that ensures that electronic devices produced by different companies can interoperate. IEEE developed the 802 family of standards that govern computer networks.

IIS

Microsoft Internet Information Server.  Microsoft's Web server that comes built-in with Windows NT Server 4 and Windows 2000 server.  Here is Microsoft's IIS web site.

Image Map

An image displayed on the webpage that has different areas that are hyperlinks. By clicking on different parts of the image browser can be redirected to another webpage, or can display modified version of the current one.

IMAP

Internet Message Access Protocol.  A method allowing a client email program to access remote messages stored on a mail server.  The protocol includes operations for creating, deleting, and renaming mailboxes, checking for new messages, message parsing, searching, and setting and clearing flags.  IMAP was originally developed in 1986 at Stanford.

IMHO

In My Humble Opinion (or: In My Honest Opinion)

IMO

In My Opinion

Internet

Not to be confused with internet (with lowercase i). The word Internet refers to all the computer networks worldwide that are connected together. TCP/IP is the de facto standard protocol set for Internet.

Internet backbone

An extremely fast network that connects major cities. Most often it utilizes T3 circuits and provides the bandwidth of 45Mbps.

Internet Group Management Protocol (IGMP)

A network control protocol running on top of the IP protocol. It is used by Internet hosts to maintain information related to multicast. All machines that want to use the multicast have to have the IGMP implemented.

InterNIC

The organization that handles domain name registrations. See http://www.internic.net/

Intranet

A part of an organization's network that is private. Only authorized individuals have access to the intranet. Besides that an intranet is very similar to the Internet in a sense that it offers the same services and uses the same protocols.

IP

(Internet Protocol) is tha main protocol used on the Internet.

IP Address

Internet Protocol Address.  A unique number identifying all devices connected to the Internet.  This number is usually shown in groups of numbers from 0 to 255, separated by periods, for example  207.46.230.218.

IP packet

IP packet is the basic data chunk that can be sent over the Internet. All the data is partitioned into IP packets on the sending computer and reassembled on the receiving computer.

IPX

Internet Packet Exchange. A Novell's proprietary network protocol.

IRC

Internet Relay Chat.  Multi-user chat service.  IRC users can go into public or private channels to discuss a topic or transfer files.  IRC servers are connected into networks.  The most popular IRC client program is mIRC.  Many hosts are vary of letting customers access IRC because of a possibility of a denial of service attack on the whole network.

IRIX

The first commercially available, mainstream UNIX operating system to support symmetric multiprocessing (SMP) capabilities. IRIX was also the first UNIX operating systems to support complete 64-bit and 32-bit environment, the first to support advanced ccNUMA scalable features and the first to support advanced realtime and graphics features.

ISDN

(Integrated Services Digital Network). An international standard that governs the transmission of both voice and data. It uses a digital circuits and has speed of 64Kbps. It can be used for normal telephone service as well as data transmission.

ISO

(International Organisation for Standardisation). An Geneva-based international organization that develops and publishes various international standards.

ISP

Internet Service Provider.  A company that provides its subscribers with Internet access.  Customers have a username and a password and can dial-up or use a cable or DSL line to connect to ISP's network which is connected to the Internet.  The biggest ISP is AOL.

ITU

(International Telecommunication Union). (Formerly CCITT). Another international standards body concerned with telecommunications.