IFrame (inline frame) is an HTML element which allows another HTML document to be imbedded inside another HTML document.

Internet Information Services (IIS), originally called Internet Information Server, is a set of web-based services for servers designed by Microsoft for use with Microsoft Windows. These services include: FTP, FTPS, SMTP, NNTP, and HTTP/HTTPS.

An image library is an archive of all images in the same directory. In the Group Tree CMS, the offers the user to link images dynamically throughout the site. The image library also allows the management of alt tags and dimensions of images.

An impulse items is a link on a webpage that has been designed to attract users. This is based on the principles of Impulse Buying.

Information architecture (IA) refers to the way information on a website is arranged. The layout of web pages the navigational structure and the use of formatting should all be used to ensure information is arranged in a way that makes it easy to find.

Inheritance allows a class to have the same behaviour as another class and is a commonly used method in object orientated programming. A simple example of inheritance in the CMS might be when an administrator adds a page it inherits the properties of its parent.

An intranet is a firewall-protected private computer network that uses Internet technologies to securely share data among employees of the same organization or company. Intranets are different from extranets as the network is generally only limited to the employees of a single organization or company, whereas extranets may also be accessed by approved customers, suppliers, or other permitted parties.

An IP (Internet Protocol) address is a unique identifier for a computer or device on a TCP/IP network. An IP identifies the connection to the network and controls how computers or devices send packets across the Internet. An IP address is a unique number in a particular format: aaa.bbb.ccc.ddd.

An Internet Service Provider (ISP), often used interchangeably with Internet Access Provider (IAP), is a company that provides its customers access to the Internet.