HYPERTEXT:
On the world wide web, the feature, built into HTML, that allows a text area, image, or other object chosen by the reader to become a “link” (as in a chain) that retrieves another computer file ( another Web page, image, sound file, or other document ) on the Internet. The term was coined by Ted Nelson around 1965, who originally invented the word “hypertext” for “non-sequential writing.

LINK:
The URL imbedded in another document, so that if you click on the highlighted text or button referring to the link, you retrieve the outside URL.

LEXIA:
A unit of hypertext literature: a card in HyperCard, a screen in  Story space, a page on the World Wide Web. The Textual Tesseract operates somewhat differently, as lexia are not separated, but rather coexist on a single page, meaning that several possible types of lexia operate at once: the word, the poem, the author, and the year are all ways in which the word could be divided into lexia.

NODE:
A generic term for any device attached to a network. A node uses the network as a means of communication and has an address on the network.

ACTIVITINTERY:
At its most basic level, a system in which a user’s input influences output.

URLS:
www.lib.berkeley.edu/TeachingLib/Guides/Internet/Glosssary.html
www.ist-socrates.berkeley.edu/~arcadia/tesseract
www.w3.org/Terms