In mathematics
Node (autonomous system), behaviour for an ordinary differential equation near a critical point
Node (graph theory), a vertex in a mathematical graph, or a point in a network topology at which lines intersect, branch or terminate
Node (algebraic geometry), a type of singular point of a curve
In computing and electronics
NODE, a wireless handheld sensor for smart devices
Node (circuits), a region in an electrical circuit where there is no change in potential
Node (computer science), the computer representation of a node in a graph, and a basic unit used to build data structures
Goal node (computer science), a node in a graph that meets defined criteria for success or termination
Node (networking), a device such as a computer or switch attached to a computer or telecommunications network, or a point in a network topology where lines intersect or terminate
Mesh node, a node on a mesh network
Node (UML), the representation of a computational device in the Unified Modeling Language
Node.js, a javascript-based programming framework
Node (textual), a self-contained unit of meaning within a hypertextual network
Node B, hardware that is connected to the mobile phone network
In science
Biology
Primitive node is the organizer tissue for gastrulation in vertebrates.
Node (botany), the place on a plant stem where a leaf is attached
In Cladistics, a shared ancestor (also see Clade)
Lymph node, an immune system organ used to store white blood cells
Space
Orbital node, the points where an orbit crosses a plane of reference
Lunar node, where the orbits of the sun and moon intersect
Longitude of the node, how orbital nodes are parameterised
Node 4, a proposed module of the International Space Station
Node Module (disambiguation), a planned module of the International Space Station
Physics
Node (physics), a point along a standing wave where the wave has minimal amplitude
Linguistics
Node (linguistics), a branch point in the Tree model, or Node Theory, of language evolution
In music
Node (band), Italian death metal band