In deployment diagrams, a device is a type of node that represents a physical computational resource in a system, such as an application server.

A device can consist of other devices; for example, an application server contains a processor.

Although there is little difference between a device and a node, the distinction can be more significant in a profile that defines specific kinds of devices in a particular environment.

Compartments display information about the attributes, deployed elements, nested nodes, and internal structure of the device.

As the following figure illustrates, a device is displayed as a three-dimensional rectangle that contains the device name and the device icon.

A device node.