Register: To pay a software company for a product to receive the full working copy. Registration is most often required for shareware programs, which may be partially disabled or contain "nags" until registered.

RFC: (Request For Comments) - The process for creating a standard on the Internet and the name of the result. New standards are proposed and published online, as a Request For Comments. Any new standards that are established retain the acronym RFC. For example, the official standard for email is RFC 822.

Robot: A program that automatically searches the WWW for files and catalogues the results.

Router: A computer or software package that handles the connection between 2 or more networks. Routers spend all their time looking at the destination addresses of the packets passing through them to decide which route to send them on.

RTFM: (Read The F***ing Manual) - A commonly used abbreviation in online forums and email, in response to foolish questions or questions already answered in the FAQ. A repository of FAQs can be found at http://rtfm.mit.edu/.