| A | B |
| Standard Generalized Markup Language | SGML;A metalanguage used to create other languages such as HTML |
| metalanguage | a language used for defining other languages |
| Document Type Definition | Your own document language rules |
| hyperlinks | Embedded instructions within a text file that link it to another point in the file or to a separte file |
| tags | pieces of code that tell the HTML interpreter how to display text |
| XML | A language used to describe data elements on a Web page but doesn't format the page's appearance |
| XSL | A style language that provides formatting instructions for XML documents |
| client | An individual computer connected to a network |
| trouble ticket | A record of a problem related to a service provider |
| troll | A Web user who publishes comments or submits feedback simply to annoy or anger |