SPAD may refer to: In aircraft manufacture Société Pour L'Aviation et ses Dérivés, also Société Provisoire des Aéroplanes Deperdussin and Blériot-SPAD, French aircraft manufacturer (1912–1921) SPAD VII, SPAD S.XII and SPAD S.XIII, French fighter planes of World War I produced by Société Pour L'Aviation et ses Dérivés A-1 Skyraider, nicknamed Spad, an attack aircraft (1950s and 1960s) Simple Plastic Airplane Design, a type of radio-controlled model airplane In science Single Pass Albumin Dialysis, liver dialysis Single-photon avalanche diode, a photodetector Other uses Special adviser (UK), a government post Self-propelled air defence, weapons Signal passed at danger by a train Suruhanjaya Pengangkutan Awam Darat, the Land Public Transport Commission of Malaysia See also Spade (disambiguation)