| lst | Ingres Dump List Data |
| lst | Kaspersky Anti-virus Blacklist |
| lst | LightScribe Label Template |
| lst | Now Contact List Template |
| lst | Oracle Database Spool Data |
| lst | Orchida Knitting System List Data |
| lst | PTC Creo Feature List Data |
| lst | SAS Procedure Output |
| lst | SignIQ Field List |
| lstx | E-Sword v9 Verse List |
| lsu | LANsurveyor Map |
| lsw | DxLibraryStudio Workspace |
| lsw | Technics SX-KN6000 Current Panel Data |
| lsz | Learning Score Zipped Data |
| lsz | Litestep Theme File |
| lt | Moltemplate Data File |
| lt2 | Poser Light Data |
| lta | Monolith LithTech Game Engine Data |
| ltc | Linguistic Tree Constructor Data |
| ltcx | Linguistic Tree Constructor XML Data |
| ltd | HPE Library and Tape Tools Support Ticket |
| ltd | LivingTime Data File |
| ltf | Frogans Short-cut |
| lth | Roxio Label Creator Style Data |
| lthmb | Adobe Presenter Audio Thumbnail |
| ltl | DIALux Luminaire Data |
| ltl | TwoTowers LTL Formula |
| ltm | Autodesk Simulation Mechanical Load Case Number Text |
| ltm | LiteMail Database |
| ltn | Carlson Survey Lot Network File |
| ltn | LinkTreeNotes Data |
| ltpl | Insight II Layout Template Data |
| ltt | HP Library and Tape Tools Log |
| ltz | Poser Compressed Light Data |
| ltz | Poser Light Data |
