ETR

ETR is a three letter acronym which may refer to:

*the East Turkistan Republic
*ElettroTreno, a series of Italian EMU trains, such as the ETR 200, ETR 450 and ETR 500
*a technical journal, Educational Technology Review
*another technical journal, Electrical Technology Russia, the English-language version of the RAS's "Elektrichestvo"
*in Canada, an Express Toll Route such as the 407 ETR
*in nuclear engineering, and Engineering test reactor or experimental test reactor
*the Eastern Test Range, a rocket testing area off of Cape Canaveral
*in repair and maintenance, Estimated Time of Repair
*in a countdown, Estimated Time Remaining
*in quality control, electrothermal response
*in rocketry, an electrothermal rocket
*in medicine, End-of-treatment response
*in medicine, Electronic Tuberculosis Register
*in plant biology, Ethylene Resistant, nomenclature for the name of plant ethylene receptors
*Essex Terminal Railway, a short line railroad in Canada
*Elstree Airfield, the IATA airport code
*Expected Time of Resolution, project