sed is a Unix utility for processing text. Sed or SED may also refer to: Science and technology Spectral energy distribution, of an astronomical source Stochastic electrodynamics, in quantum mechanics Sedirea (Sed.), a genus of orchids Medicine Selective eating disorder or avoidant/restrictive food intake disorder Spondyloepiphyseal dysplasia congenita, an inherited genetic bone disorder Erythrocyte sedimentation rate (sed rate), a haematology test Technology, engineering and computing Surface-conduction electron-emitter display, a flat-panel display technology DEC SED (text editor), for some DEC operating systems Self-encrypting device, an encrypting hard drive Organisations Socialist Unity Party of Germany (), East German communist party Swiss Seismological Service () Education Scottish Education Department Companies SED Systems, a Canadian satellite communications provider Tata Power SED, Tata Power Strategic Electronics Division Other uses Survey of English Dialects Strategic Economic Dialogue Sed card, a "portfolio-on-a-card" used by models and actors Sed festival, in Ancient Egypt Shippers Export Declaration, a US form See also Students for the Exploration and Development of Space (SEDS)