MRR

MRR may stand for:

Sport

• Manchester Road Race, a Thanksgiving Day race held annually since 1927

Science

• Mean reciprocal rank, a search quality measure in information retrieval
• Modulating retro-reflector, Free space optical communications technology

(metal removal rate)

Online business

• Master Resell Right

Roads

In the names of roads, Middle Ring Road:

• Kuala Lumpur Middle Ring Road 1 (Malaysia), an urban and municipal main ring road in Kuala Lumpur
• Kuala Lumpur Middle Ring Road 2 (Malaysia), a ring road connecting neighborhoods near Kuala Lumpur and Selangor
• Penang Middle Ring Road (Malaysia), a major ring road in Penang, Malaysia
• Middle Ring Road (Tianjin) (China), a system of roads partly encircling the core of Tianjin
• Birmingham Middle ring road (A4540) in England
• Mackay Ring Road, a proposed bypass route of Mackay

Media and pop culture

• Maximumrocknroll, a punk zine
• My Restaurant Rules, an Australian reality show

Literature and humanities

• Marcel Reich-Ranicki (1920–2013), German literary critic
• T.R.S. Broughton's (1900–1993), Magistrates of the Roman Republic

Other

• Multi Rolle Radio (military), a modular radio set
• José María Velasco Ibarra Airport (IATA code), an airport serving Macará, Ecuador
• Marine Raider Regiment, a special operations force of the United States Marine Corps