| lmh | Memory Hacking Software LMH Data |
| lmi | Homeportal SW1000 Firmware Recovery Data |
| lmk | Sprint-Layout Macro File |
| lml | Log Markup Language Document |
| lmlpack | Kashmir 3D LML Package |
| lmp | Luminar Individual Look Data |
| lmq | LinMailPro Queue Data |
| lmr | Intuit Quickbooks Loan Manager Data |
| lms | Light-O-Rama Musical Sequence |
| lmtbackup | LetMeTalk Profile Backup |
| lmx | Nokia Landmark Exchange File |
| lmx | VB Language Manager Pro Export Data |
| ln9 | PADS Layout Library 2D Lines Data |
| lna | Xilinx ISE LNA Data |
| lng | Adobe RoboHelp Language Data |
| lngx | KeePass v2 Language Data |
| lnml | LonWorks LON XML File |
| lns | AVG Language Data |
| lo1 | Pervasive DataExchange Log |
| lo2 | Pervasive DataExchange Log |
| lo3 | Pervasive DataExchange Log |
| lo4 | Pervasive DataExchange Log |
| lo5 | Pervasive DataExchange Log |
| loa | MAXQDA Saved Formula |
| lob | IBM DB2 Large Object Data |
| lobs | HyperSQL Lobs Data |
| loc | EEGLAB Location Data |
| loc | TopoGrafix Location Data |
| loc4 | 4D Database for Mac Client Local Data |
| local | Paket Local Data |
| localstorage | WebKit Local Storage Data |
| location | Microsoft Windows 10 Registry Data |
| lock3 | BlackBerry Encrypted 3GP |
| locs | EEGLAB Location Data |
| locs | Illumina BeadArray Location Data |