The term réseau derives from a French word meaning "network". It may mean:

• a network of fine lines on a glass plate, used in photographic telescopes to make a corresponding network on photographs of the stars: see Réseau plate
• a system of weather stations under a single agency, or cooperating on common goals
• an intelligence network as used by John Le Carré, in Tinker, Tailor, Soldier, Spy, chapter 11.
• the net in bobbin lace
• SNCF TGV Réseau

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