| Abbreviation | Definition |
|---|---|
| LIS | Logical IP (internet Protocol) Subnet |
| LISA | Large Installation System Administration |
| LIT | Local Implementation Team |
| LIU | Light Interface Unit |
| LIU | Logged In User |
| LL | Low Latency |
| LLC | Last Logical Communication |
| LLC | Linearly Locally Connected |
| LLC | Local Link Control |
| LLC | Logical Link Control |
| LLPQ | Low Latency Priority Queuing |
| LLQ | Low Latency Queue |
| LLT | Low Level Transport Layer |
| LLTD | Link-Layer Topology Discovery |
| LM | Local Machine |
| LM | Lock Manager |
| LMAP | Lightweight MTA Authentication Protocol |
| LMDS | Local Multipoint Distribution Service |
| LME | Local Management Entity |
| LMG | Linux Mail Group |