I think asking questions or PMing a friend you think might know is easier than trying to do a glossary as everyone would have different sorts of questions and I think it would be too hard to anticipate who would need to know what.

Your questions, Gus, for example, are computer questions about how bulletin board software like PC's work whereas TheByzantine gave wonderful links to psych terms. There's programming questions and software questions and psychology questions and personal interest/education questions or questions by non-native English speakers; how could anyone put all that into a single glossary? Kind of beyond the scope of the site?