TR1

TR1 may refer to:

• C++ Technical Report 1, a document proposing additions to the C++ Standard Library
• Regency TR-1, an early transistor radio model
• Triumph 20TS, an unsuccessful automobile prototype unofficially called the TR1
• Tomb Raider (1996 video game), the first video game in the Tomb Raider series
• TR-1A or TR-1B, variants of the Lockheed U-2 surveillance aircraft
• Hitachi TR.1
• TR.1, see Orenda Engines
• TR1, a postal district in the TR postcode area
• TAS1R1, a taste receptor
• Tri-R KIS TR-1, an American aircraft design
• Lyulka TR-1, first Soviet turbojet engine
• Tropical Race 1, a strain of Fusarium oxysporum that causes the Panama disease
• Type 1 regulatory T cell (Tr-1), a T-lymphocyte lineage with immunoregulatory function
• Yamaha TR-1 High Output Boating Engine
• VR Class Tr1, a Finnish locomotive class