TSP is a three-letter abbreviation with multiple meanings. It is most often an abbreviation for the volume measurement teaspoon, and is usually written in lowercase as tsp. It can also mean:

Science and technology[link]

• Team Software Process, a framework for producing software products
• Telecommunications service provider, telecommunications company
• Telephony Service Provider, software interface to telephony device
• Thrombospondin, protein
• Time Stamp Protocol, cryptographic protocol
• Titanium sublimation pump, a type of vacuum pump
• Touch Screen Panel
• Touch Screen Pen
• Trailer stability program, extension of vehicle Electronic Stability Control system
• Transit signal priority, name for various techniques to speed up bus public transport.
• Transport Sample Protocol, open source protocol for sampling data
• Travelling salesman problem, challenging mathematical problem
• Trimethylsilyl-2,2,3,3-tetradeuteropropionic acid, derivative of tetramethylsilane
• Trisodium phosphate, chemical compound often used as a household cleaner
• Tropical spastic paraparesis
• TSP (econometrics software), programming language for the estimation and simulation of econometric models
• Tunnel Setup Protocol, protocol used to negotiate IP tunnels between a TSP client and a TSP server

Cooking[link]

• Teaspoon, a spoon used in measuring

Governmental[link]

• Taconic State Parkway, parkway in New York State, USA
• Telecommunications Service Priority, FCC program affecting telecommunications service providers
• Terrorist Surveillance Program, abbreviation used by the White House, USA
• Texas Student Publications, student media organization at the University of Texas
• Threatened Species Protection Act 1995, Tasmania, Australia
• Thrift Savings Plan, defined contribution plan for members of the US civil service and uniformed services

Internationally[link]

• Tajikistan Support Project, foundation helping healthcare projects in Tajikistan
• Telecomunicacoes de Sao Paulo S.A., Brazilian telecommunications company trading on New York Stock Exchange with symbol "TSP"
• Texas Star Party, one of three major annual star parties in the USA
• TSP, IATA airport code for Tehachapi Municipal Airport, California, USA
• Three-Self Patriotic Movement, government-sanctioned Christian movement in the People's Republic of China

Miscellaneous[link]

• Textured soy protein
• The Smashing Pumpkins
• The Sex Pistols
• Tom Sound Production

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