What does CAN mean?
What is CAN? [Note] * 1 IS InternaTIonal OrganizaTIon for StandardizaTIon (International Organization for Standardization)
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CAN is an abbreviation of Controller Area Network (hereinafter referred to as CAN) and is an ISO * 1 internationally standardized serial communication protocol.
In the current automotive industry, various electronic control systems have been developed out of requirements for safety, comfort, convenience, low pollution, and low cost. Due to the different data types and reliability requirements for communication between these systems, there are many cases of multiple buses, and the number of wiring harnesses has also increased. In order to meet the needs of "reducing the number of wiring harnesses" and "high-speed communication of large amounts of data through multiple LANs", in 1986, the German electrical company Bosch developed the CAN communication protocol for automobiles. Since then, CAN has been standardized through ISO11898 and ISO11519, and is now the standard protocol for automotive networks in Europe.
Now, CAN's high performance and reliability have been recognized and are widely used in industrial automation, ships, medical equipment, industrial equipment, etc.
Figure 1 is a conceptual diagram of the vehicle network. The development of communication protocols such as CAN has enabled multiple LANs to exchange data through gateways. 
* 2 FlexRayTM is a registered trademark of DaimlerChrysler Corporation.