LR
- .22 Long Rifle
- .lr
- Adobe Lightroom
- Avianca Costa Rica
- L(R)
- LR parser
- Latvijas Radio
- Lawrencium
- Left and right (disambiguation)
- Legislative route
- Lenoir–Rhyne University
- Lenong Regiment
- Lexical resource
- Liberia
- Light rail
- Limiting reagent
- Link register
- Lithuania
- Little Rock, Arkansas
- Lloyd's Register
- Long Range (disambiguation)
- Ringer's lactate solution
- The Republicans (France)