| RL&L | Romance Languages and Literatures 
| Others |
| RLL | Radio in the Local Loop
| Others |
| RLL | Radio Liban Libre
| Others |
| RLL | Rahal Letterman Lanigan
| Others |
| RLL | Ramapo Little League
| Others |
| RLL | Ranbaxy Laboratories Limited
| Others |
| RLL | Read Listen and Learn
| Others |
| RLL | Reading Literacy and Learning
| Others |
| RLL | Real Larry Lujack
| Others |
| RLL | Real Life Learning
| Others |
| RLL | Recent Literature on Lichens
| Others |
| RLL | Record Linking Lab
| Others |
| RLL | Reduced Lower Limit
| Others |
| RLL | Reference and Loan Library
| Others |
| RLL | Relay Ladder Logic
| Others |
| RLL | Renters Legal Liability
| Others |
| RLL | Respiration Line Length
| Others |
| RLL | Reston Little League
| Others |
| RLL | Retention Learning and Leverage
| Others |
| RLL | Richmond Little League
| Others |
| RLL | Ridgefield Little League
| Others |
| RLL | Right Low Lobe
| Others |
| RLL | Right Lower Leg
| Others |
| RLL | Right Lower Lobe
| Others |
| RLL | right lower lobe (lung)
| Others |
| RLL | Rockford Little League
| Others |
| RLL | Rocklin Little League
| Others |
| RLL | Romance languages literatures
| Others |
| RLL | Roots Location List
| Others |
| RLL | Row Level Locking
| Others |
| RLL | Run Length Limited
| Others |
| RLL | Run-Length Limited
| Others |
| RLL | Rusher, Loscavio, & LoPresto
| Others |