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+## Core Concepts
+
+| Lavina   | IRC         | XMPP                | Matrix     |
+| -------- | ----------- | ------------------- | ---------- |
+| Realm    | Network     | Server              | Homeserver |
+| Player   | User        | User                | User       |
+| Room     | Global chan | MUC/MIX group chats | Room       |
+| Presence | N/A         | Presence            | ?          |
+
+## Player
+
+| Lavina    | IRC      | Description                 |
+| --------- | -------- | --------------------------- |
+| Username  | Nickname | Visible name of user's      |
+| Username  | Username | Mostly unused in modern IRC |
+| Full name | Realname | User's free-form real name  |
+| Username  | Account  | IRC extension               |
+
+## Rooms
+
+| Lavina | IRC           | Description                |
+| ------ | ------------- | -------------------------- |
+| Member | Joined        | Shown in room's memberlist |
+| Join   | JOIN          | Become a room's member     |
+| Leave  | PART          | Stop being a room's member |
+| Ban    | MODE #chan +b | Ban a current room member  |