| Acronym | Definition |
|---|
| LTU | Luleå Tekniska Universitet (Luleå University of Technology; formerly Luleå Tekniska Högskola) |
| LTU | Lithuania |
| LTU | Lawrence Technological University (Southfield, Michigan) |
| LTU | La Trobe University (Australia) |
| LTU | License to Use |
| LTU | Leeds Trinity University (UK) |
| LTU | Long-Term Unemployment |
| LTU | Lufttransport-Unternehmen GmbH (German air transportation company - vacation airline) |
| LTU | Line Termination Unit |
| LTU | Learning and Teaching Unit (various universities) |
| LTU | Land Treatment Unit |
| LTU | Louisiana Tech University |
| LTU | Line Terminating Unit |
| LTU | Littoisten Työväen Urheilijat (Finnish team) |
| LTU | Laser Transceiver Unit (military aviation) |
| LTU | Laboratory Test Unit |
| LTU | Line Test Unit |
| LTU | Large Tax Payers Unit (Pakistan) |
| LTU | Load Transfer Unit |
| LTU | Line Tuning Unit |
| LTU | Luft-Technische Union (German Tourist Airline) |