What is "etr"

ETR may refer to:

• East Turkestan Republic (disambiguation)
• Eastern Test Range, a rocket testing area off of Cape Canaveral
• Echigo Tokimeki Railway, a railway operating company in Japan
• Effective Tax Rate, a method of expressing the overall percentage of a company's revenue which is paid in taxes
• Electron transport rate, a relative measurement of Photosynthesis
• ElettroTreno, a series of Italian high-speed trains
• Elstree Airfield, the IATA airport code
• Entergy Corporation, NYSE stock symbol
• Essex Terminal Railway, a short line railroad in Canada
• Etravirine (Intelence/TMC125), an antiretroviral drug used in HAART to suppress HIV replication
• Exponential trace function of linear algebra, usually written in lower case (etr)
• Express Toll Route, in Canada
• Xetra (trading system), three-letter identifier for the Xetra electronic trading system of Deutsche Boerse AG, based in Frankfurt, Germany.
• Santa Rosa International Airport, the IATA airport code