Linked from
The 18 pages that link to Normal force, each with the reason it gives.
PressureRelated: Pressure counts the component of force perpendicular to the surface.
Centripetal forceRelated: A track or banked road can exert an inward normal-force component.
WeightRelated: A resting support balances weight, but the normal force is not itself weight.
Free-body diagramRelated: It represents the surface's push on an isolated object resting against it.
Newton's third lawRelated: Its reaction acts on the other surface, not as the object's weight.
Static frictionRelated: It sets the scale of the maximum static friction in the Coulomb model.