Device is any kind of connected device that can be connected to Internet and is described with a data model inside the platform.
A Stream is a dataset connected to a Device. Devices will produce data and this data will be stored inside streams.
A Channel is the single data element inside the stream. Imagine it as a column inside a table.
A Subscription is a way to communicate asynchronously with the a client (like a device). The client will connect and receive updates when they become available.
An Actuation allows to perform actions on a connected device and monitor the status of such operations.
A token is a secret key used to identify an user when interacting with the platform. There may be many token, connected to the same user.