TSP

TSP is a three-letter abbreviation with multiple meanings, including:

Tajikistan Support Project: Foundation helping healthcare projects in Tajikistan
Talented Student Program, an initiative offered at the Faculty of Science at The University of Sydney to increase student participation in research projects, from an early stage in undergraduate courses.
TAPI Service Provider: a driver for TAPI devices.
Teaspoon (usually written in lowercase: tsp).
Team Software Process (SM): A set of guidelines and best practices to incorporate discipline in the software development process.
Telecomunicacoes de Sao Paulo S.A. Template:Nyse, a telecommunications company in Sao Paulo, Brazil.
Ternary space partitioning.
Textured soy protein.
Thiele Small parameter: loudspeaker model parameters named after its developers Richard H. Small and Albert Neville Thiele.
Thrift Savings Plan: a type of U.S. federal government retirement account.
Traveling salesman problem: a challenging mathematical problem.
Trisodium phosphate: a chemical compound.
Tunnel Setup Protocol: method of configuring tunnels as in use by the Hexago Tunnel Broker and others.