SHD may refer to: Shenandoah Valley Regional Airport, the IATA code SHD Sahara Airlines (Algeria), the ICAO code SHD ISO 639:shd, the ISO 639 code for the Kundal Shahi language Defence Historical Service (French: Service historique de la défense), the archives centre of Ministry of Defence and its armed forces Sandhoff disease, a lysosomal genetic, lipid storage disorder