ETR

ETR is a TLA which may refer to:

• the East Turkistan Republic
• ElettroTreno, a series of Italian EMU trains, such as the 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 near Cape Kennedy
• 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