| LLT | L. L. Thurstone Psychometric Laboratory 
| Others |
| LLT | Language Learning and Technology
| Others |
| LLT | Language Learning Technology
| Others |
| LLT | Language Literacy and Technology
| Others |
| LLT | Later Life Training
| Others |
| LLT | Latin Language Toolkit
| Others |
| LLT | Latinas Leading Tomorrow
| Others |
| LLT | Law Logic and Technology
| Others |
| LLT | Learn Live Together
| Others |
| LLT | LED Lensed Troffer
| Others |
| LLT | Liberty Life Trail
| Others |
| LLT | Life Loyal Teke
| Others |
| LLT | Link Layer Topology
| Others |
| LLT | Liquid Line Temperature
| Others |
| LLT | Lithium Lanthanum Titanate
| Others |
| LLT | Local Lander Time
| Others |
| LLT | Local Leadership Team
| Others |
| LLT | Local Loop Technologies
| Others |
| LLT | Local Lymphoid Tissue
| Others |
| LLT | Log Likelihood Transformation
| Others |
| LLT | Long Lead Time
| Others |
| LLT | Long Live Trinity
| Others |
| LLT | Looks Like Trouble
| Others |
| LLT | Lost Lennon Tapes
| Others |
| LLT | Loveland Laser Tag
| Others |
| LLT | Low Latency Transport
| Others |
| LLT | Low Level Transport Layer
| Others |
| LLT | Low Level Trigger
| Others |
| LLT | Lower Limiting Temperature
| Others |
| LLT | Lower-Level Terms (MedDRA)
| Others |
| LLT | Lowest Level Terms
| Others |