AUTOSAR (Automotive Open System Architecture) is a worldwide development partnership of car manufacturers, suppliers and other companies from the electronics, semiconductor and software industry. 

AUTOSAR is a partnership of automotive OEMs and tool vendors whose objective is to create and establish open standards for automotive E/E (Electrics/Electronics) architectures that will provide a basic infrastructure to assist with developing vehicular software, user interfaces and management for all application domains.

The primary goal of AUTOSAR is standardization of basic system functions and functional interfaces and the ability to integrate, exchange, and transfer functions within a car network in order to substantially improve software updates and upgrades over the vehicle lifetime.

Many of the low-level components of AUTOSAR are derived from OSEK.