is a standards body that has produced specifications for an embedded operating system, a communications stack, and a network management protocol for automotive embedded systems. It has also produced other related specifications. OSEK was designed to provide a standard software architecture for the various electronic control units (ECUs) throughout a car.

OSEK is an acronyme for "Offene Systeme und deren Schnittstellen die Elektronik in Kraftfahrzeugen" - in English this means: "Open Systems and their Interfaces for the Electronics in Motor Vehicles")