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Glossary of Terms for Webmaster Training

Application Server
A machine or its software that works in conjunction with a web server to deliver application services such as the dynamic creation of a webpage from content stored in a database.
Compression
A technique used to reduce the file size of an electronic file by employing an algorithm to eliminate redundant or non-essential information.
Flash
A technology used to create interactive animations, video and audio in a compressed state for web presentation.
Information Architecture
The art and science of organizing information to help people effectively fulfill their information needs. For a complete glossary on information architecture, visit the Argus Center for Information Architecture (ACIA) at Argus-ACIA.com.
Learnability
A term used to describe how easy it is for users to accomplish basic tasks the first time they encounter the user interface.
Legibility
A term used to describe how easy it is to visually comprehend the letters of a word.
Location Awareness
The usability practice of ensuring users will understand where they are, how they got there and how they can go somewhere else.
Memorability
The ease of which a user can restablish a previous level of proficiency with a user interface.
Readability
A term used to describe how easy it is to read a passage of text.
Robots.txt
A file placed in a folder/directory of a web server that is meant to be consumed by web crawlers or spiders which index websites. Intended as a guide to these agents and not as a security measure, it politely suggests that the indexing agent be allowed to index only certain files and directories. See - creating a robots.txt file.
URL
Uniform Resource Locator. This is the address of a web page.
User Agent
A more formal term used to identify a software application that requests URL's.
User Interface
The design employed to present and facilitate interaction with the elements of a website.
Web Server
A machine or the software it runs which returns a web page to a web browser when the web browser requests it. Examples are Internet Information Server (IIS) or Apache.
Web Page
An (X)HTML file that presents text, hyperlinks, images, colors and other electronic media in a single browser window or tab.
Web Browser
A software application that is capable of requesting, interpreting and displaying a web page.
Query String
A URL encoded with a list of variables that the web server receives and delegates to an application server.

For a more ample IT reference list please visit the W3C Dictionary and Glossary.