ASABE has initiated an adoption of international standard ISO 12934:2013, Tractors and machinery for agriculture and forestry - Basic types – Definitions. ASABE standard ANSI/ASAE S390, Definitions and Classifications of Agricultural Field Equipment, was used as the basis document for the development of ISO 12934 and is also referenced in various U.S. and state regulations. Adoption will further harmonize national and international standardization.