| lmq | LinMailPro Queue Data |
| lmr | Intuit Quickbooks Loan Manager Data |
| lms | Light-O-Rama Musical Sequence |
| lmx | Nokia Landmark Exchange File |
| 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 | TopoGrafix Location Data |
| local | Paket Local Data |
| localstorage | WebKit Local Storage Data |
| locs | Illumina BeadArray Location Data |
| locx | ARNColoc Custom Loc Data |
| lof | Audacity File List |
| logonxp | LogonStudio Windows XP Logon Screen |
| lol | CYANA Lower Distance Limit File |
| lon | Aquaterra Longitudinal Profile Data |
| look | Adobe SpeedGrade Look |
| loov | SmadAV Virus Definitions |
| lop | MasterCook Layout Data |
| lov | SAP Business Objects LOV File |
| lp | Lightscape Preparation File |
