MRB
- Cycle Collstrop
- Eastern WV Regional Airport
- MRB Productions
- MRB constant
- Maidenhead Railway Bridge
- Main Roads Board
- Malaysian Rubber Board
- Manorbier railway station
- Maribo
- Marijuana
- Marina Bay MRT station
- Mariënberg railway station
- Martinsburg (Amtrak station)
- Metallica Resources
- Michael Reilly Burke
- Mobile Riverine Force
- Modified reflected binary
- Mortgage revenue bond loan
- Mother Russia Bleeds
- Mullamangalath Raman Bhattathiripad
- Murrumbeena railway station