# Glossary (/en/realtime-media/whiteboard/reference/glossary)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

## A [#a]

### App Identifier [#app-identifier]

The App Identifier, also called the App ID, is the unique identifier of a whiteboard project. You use it when initializing the Whiteboard SDK or Fastboard SDK.

### Access Key (AK) [#access-key-ak]

The Access Key is part of the credential pair used to generate whiteboard tokens.

## R [#r]

### Room token [#room-token]

A Room token is tied to a specific whiteboard room. It grants access to that room according to the assigned role, such as `admin`, `writer`, or `reader`.

### Room UUID [#room-uuid]

The Room UUID is the unique identifier of a whiteboard room. You receive it when the room is created successfully.

## S [#s]

### SDK token [#sdk-token]

An SDK token is the highest-permission token type in Interactive Whiteboard. It is linked to a specific whiteboard project and can be used to manage rooms and file-conversion tasks for that project.

### Scene [#scene]

A scene is a whiteboard page that can contain drawings, text, images, or converted presentation content. A room can contain multiple scenes and scene directories.

### Subscription mode [#subscription-mode]

Subscription mode is the read-only mode for joining a whiteboard room. Users in this mode can view content but cannot edit the whiteboard.

## T [#t]

### Task token [#task-token]

A Task token is linked to a specific file-conversion task and is used when querying task progress or related results.

### Task UUID [#task-uuid]

The Task UUID is the unique identifier of a file-conversion task. It is returned when you start a file-conversion task successfully.

## W [#w]

### Whiteboard SDK [#whiteboard-sdk]

The Whiteboard SDK is the lower-level SDK for building custom interactive whiteboard experiences.

### Fastboard SDK [#fastboard-sdk]

The Fastboard SDK is the higher-level SDK that adds a ready-to-use UI and related integrations on top of the Whiteboard SDK.