TSD

TSD may refer to:

• Tay-Sachs Disease, a genetic disorder, fatal in its most common variant
• Tang Soo Do (tangsudo), a Korean martial art that has been largely incorporated into modern Taekwondo
• The Starship Destiny, a pixel art webcomic by Sean Howard
• TSD rally, a form of motor sport usually conducted on public roads that focuses on Time, Speed, and Distance calculations
• The Sickest Drama
• Technical SafeAir Diver
• CIA's Technical Services Division
• Telescope Systems Division
• temperature-dependent sex determination
• Texas School for the Deaf
• Text, Speech and Dialogue
• Tensai! Shimura Doubutsuen
• thread-specific data
• Total Sleep Deprivation
• Training Systems Division
• Transylvanian Society of Dracula
• Tivoly Service Desk
• Treasury Solicitor's Department
• Turtle Saving Devices, modified Turtle excluder devices