Any computer or device that is relevant to an implemented system can be shown as a Node. A Node symbol is a three-dimensional square with a name on it. Devices in a system are typically represented with a stereotype that specifies the device type. The nodes can be represented as types and as instances.
You can specify Node properties in the Node Specification window, where you can also read descriptions of each property. Descriptions are presented in the description area of the Specification window.