..this is so that we can speak/understand the same language...
Site Administrator: (now known as ‘Developer’ in Melange). The all powerful one who initially set up a Melange site.
Sponsor: Example - Google. “It is not expected that very many Sponsor organizations will be created for a running Melange site, often only one.”
Host: Example - LH. Hosts sign up as regular users and are later promoted/blessed/anointed to being hosts either by the site administrator or by another host.
Program: Examples - GsoC-2008 or GHOP-2008. A program is an individual instance. We’re NOT calling a generic ‘GSoC’ or ‘GHOP’ a program, but are qualifying by which one, i.e. which year.
Quiz: (was ‘Questionnaire’) Example - the mid term mentor survey. A set of questions created by an author. A quiz has a target audience, e.g. mentors, students. Creating a new quiz automatically creates a new questions-page and answers-summary page. The quiz mechanism will be used in multiple places, e.g. it's also used for terms of service. See QuestionnairePages.
Club: Example - Apache, GSoCers from Poland, Documentators. A Club is a generic type of Group that gathers Members into a community. This is a group that is going to be used in social networking related Melange features. Club can gather Members and later apply to become an Organization for a particular Program.
Explanation (from MelangeIrcLogs): User is unique for each Google Account. Person is not. There is a Person (with things like shipping address, public email address, etc.) for each Role that a User can have on the site. User is some very harmless “nickname” and “linkname” (used in URLs) info attached to a User (Google Account). User is site-wide. Person is per-Program (per-year) and per-Role. So, User is supposed to be minimal and not contain time-sensitive data.