asdf or ASDF may refer to* Association of Synchronous Data Formats, an organization that advances the use of synchronous data transmission technology Alabama State Defense Force, a military entity Alaska State Defense Force, a military entity Average Squared Difference Function, a mapping used in pitch detection algorithms Japan Air Self-Defense Force Hoverboard ASDF, a South Korean-developed online racing video game Another System Definition Facility, the most commonly used build system for Com… (More on Asdf)