Plug-ins: A hardware or software module that adds a specific feature or service to a larger system. The idea is that the new component simply plugs in to the existing system.
HTML (Hypertext Markup Language): Short for HyperText Markup Language, the authoring language used to create documents on the World Wide Web. HTML is similar to SGML, although it is not a strict subset.
Players: A program that plays back audio or video. A good example of this is Windows Media Player or iTunes.

