| Abbreviation | Definition |
|---|---|
| LSM | Library Storage Module |
| LSN | Large Scale Network |
| LSN | Large Scale Networking |
| LSN | Leads System Network |
| LSN | Local Security Network |
| LSN | Local Session Number |
| LSP | Label Switched Path |
| LSP | Layered Service Provider |
| LSP | Link State Protocol |
| LSR | Label Switch Router |
| LSS | Loadable Storage Systems |
| LSS | Local Storage System |
| LSTP | Low Signal Transfer Point |
| LSU | Link State Update |
| LSZ | Local Scope Zone |
| LTA | Long Term Archiving |
| LTR | Long Terminal Repeat |
| LTSP | Linux Thin Server Project |
| LTU | Logical Transmission Unit |
| LUA | Limited User Account |