| PLN | Pacific Legal Network 
| Others |
| PLN | Parti de la Loi Naturelle
| Others |
| PLN | Passionate Little Nutcase
| Others |
| PLN | Pellston Regional Airport, Pellston, Michigan USA
| Others |
| PLN | Penn Literacy Network
| Others |
| PLN | Perplexing Linguistic Notion
| Others |
| PLN | Personal Learning Network
| Others |
| PLN | Personal Learning Networks
| Others |
| PLN | Perusahaan Listrik Negara
| Others |
| PLN | Perusahaan Listrik Negara (Indonesia State-owned power utility)
| Others |
| PLN | Pharmacy Learning Network
| Others |
| PLN | Piano Lessoners Network
| Others |
| PLN | Point Loma Nazarene
| Others |
| PLN | Polish NEW Zloty
| Others |
| PLN | Pomona Leadership Network
| Others |
| PLN | Port Letter and Number
| Others |
| PLN | Postfix Literal Notation
| Others |
| PLN | Practice Leadership Network
| Others |
| PLN | Pre-Launch Notification
| Others |
| PLN | Premix Low NOx
| Others |
| PLN | Prison Legal News
| Others |
| PLN | Private LOCKSS Network
| Others |
| PLN | Probabilistic Logic Networks
| Others |
| PLN | Professional Learning Network
| Others |
| PLN | Professional Learning Networks
| Others |
| PLN | Program Logic Network
| Others |
| PLN | Project Lean Nation
| Others |
| PLN | Protein Losing Nephropathy
| Others |
| PLN | Pt Loma Nazarene
| Others |
| PLN | Pump Line Nozzle
| Others |
| PLN | WordPerfect for Windows Spreadsheet file
| Others |