SAE J 1939-02 Agricultural and Foresty Off-Road Machinery Network specifies the requirements for application of SAE J 1939 in agricultural and foresty equipment. This document specifies the series of documents within the set of SAE J1939 documents that are applicable to agricultural and forestry equipment and provides further requirements for this industry.

The SAE and ISO groups have cooperated to define agricultural and foresty networks in a manner to allow compatibility of ECUs and messaging protocols between the A&F and the T&B networks.