module- any of a number of distinct but interrelated units from which a program may be built up or into which a complex activity may be analyzed
HTML- Hypertext Markup Language, a standardized system for tagging text files to achieve font, color, graphic, and hyperlink effects on World Wide Web pages
hypertext- a software system that links topics on the screen to related information and graphics, which are typically accessed by a point-and-click method
bookmark- a record of the address of a file, web page, or other data used to enable quick access by a user
I used the Dictionary application for Mac OS to find all of the definitions here.