(1) In a communications system, a node is a network junction or connection point. Every terminal, computer, hub and switch is a node.

(2) In database management, a node is an item of data that can be accessed by two or more routes.

(3) In the Document Object Model (DOM), which exposes HTML and XML content to an application or script, every element, every attribute of that element, and each piece of textual content for every attribute is considered a node. See DOM.

(4) In computer graphics, a node is an endpoint of a graphical element.

(5) In multiprocessing systems, a node can be a single processor or system. In MPP, it is one processor. In SMP, it is one computer system with two or more processors and shared memory.