• Mavalli Tiffin Room, an Indian food company
  • MTR Foods, a food products company based in Bengaluru, India
• Melbourne Talk Radio, a former radio station in Victoria, Australia
• Memphis Teacher Residency, Memphis, Tennessee, US
• MTR Gaming Group, a former gaming company in West Virginia, US
• Roman Traditional Movement (Movimento Tradizionale Romano), in Italy
• Museum of Television & Radio (MT&R), American cultural institution, now the Paley Center for Media
• Goodyear Tire and Rubber Company (MT/R)
• Mesa Royalty Trust (NYSE stock symbol: MTR), a natural gas royalty trust

Transportation edit

• Los Garzones Airport (IATA code), Montería, Córdoba, Colombia
• Montreal Central Station (Amtrak code), Quebec, Canada
• MTR Corporation, operator of Hong Kong Mass Transit Railway, and MTR Crossrail
  • MTR Properties
• MTR Western, a motorcoach operator in North America
• Matraman railway station (station code MTR), in East Jakarta, Indonesia
• Montour Railroad (reporting mark), a former railroad in Pennsylvania, US

• Materials testing reactor, a research reactor type
• Materials Testing Reactor, Idaho, US
• Mill test report (metals industry)
• Methionine synthase, responsible for the regeneration of methionine from homocysteine
• MTR (software), or My traceroute, a network diagnostic tool

• Mobile Termination Rate, between telecoms operators
• Mountaintop removal mining, in coal mining