FDK may refer to:
Fortress Division Kreta, temporary designation of 164th Infantry Division (Wehrmacht), a World War II German Army unit Fraunhofer FDK AAC, an audio codec Adobe Font Development Kit for OpenType, a set of tools for editing and verifying OpenType fonts FDK Corporation, a manufacturer of batteries, majority belonging to Fujitsu FlyDamas, a Syrian airline (ICAO code FDK) Frederick Municipal Airport (Maryland), in the US (IATA airport code FDK) "F.D.K. (Fearless Doctor Killers)", a song on the Mudhoney album My Brother the Cow Fdk., abbreviation for the hybrid orchid genus Fredclarkeara FDK, also refers to Firmware Development Kit in the Embedded System