| lib | Finale Library Data |
| lib | FluidDraw Library |
| lib | Maple Repository Data File |
| lib | PSpice Library |
| lib | Sage MAS 90 Library Data |
| lib | TINA Library |
| lib | WAsP Wind Atlas Data |
| lib4d | Maxon Cinema 4D Preset Library |
| libpkg | Altium Designer Integrated Library Package |
| library | Catia Library |
| library | LabCognition Panorama Library |
| library-ms | Windows Library Description |
| lic | General License File |
| licenses | Visual Studio Licensed Classes Data |
| lickey | AVS4YOU License Key Data |
| lidata | LiDAR360 Data |
| lif | Intuit TurboTax Information Archive |
| life | Light Data |
| lig | Afm2pl Ligkern Specifications |
| lightkeyfxt | Lightkey Fixture Data |
| lij | Apple Photos Data |
| lijs | Apple Photos Data |
| lim | LIMP Impedance Data |
| lime | Lattice QCD Interchange Message Encapsulation Data |
| lims | Liquid Injection Molding Simulation Data |
| lin | Autodesk AutoCAD Linetypes |
| lin | LISCAD Line Styles Data |
| linf | LinF Source Code |
| link | iPod Link Data |
| linx | iPod Links Folder Data |
