A key point in the process of information flow between the different subsystems that take part in the Precision Agriculture management systems is how machinery, software and other electronics systems communicate one each other. Several worldwide standards have been established (such as ISO 11783, known as "ISOBUS") that define precisely the way of transferring information and control commands by the internal electronic communications within farm machinery. Other standards (established or de facto) are also used, such as wireless communication in agriculture.