MRL may refer to:
KL Monorail Line, a rapid transit monorail line in Malaysia Magnetic Reference Laboratory, an American company that makes and sells Calibration Tapes Margaret Ruthven Lang (1867–1972), an American composer Mineral Resources Limited, Australian mining company Official Monster Raving Loony Party, a UK political party Montana Rail Link, a US railroad Merck Research Laboratories, an American pharmaceutical company
Technology related:
Manufacturing readiness level, a measure of the maturity of the manufacturing readiness of an object of technology related to Technology Readiness Level (TRL) Maximum residue limit, a trading standard, usually for pesticide residues on foodstuffs Media resource locator, a URI for multimedia Multiple rocket launcher Murphy Roths large, a strain of mouse, having remarkable tissue regeneration abilities Machine room-less elevators