| Acronym | Definition |
|---|
| ALN | Alton (Amtrak station code; Alton, IL) |
| ALN | Asynchronous Learning Networks (e-learning) |
| ALN | Aluminum Nitride (ceramic substrate material used for heat dissipation in electronics) |
| ALN | Alphanumeric (data type) |
| ALN | Armée de Libération Nationale (French: National Liberation Army; Algeria) |
| ALN | Arid Lands Newsletter |
| ALN | About Last Night |
| ALN | Alaska Library Network (Anchorage, AK) |
| ALN | Archdiocesan Legal Network (est. 1989; Washington, DC) |
| ALN | Adaptive Logic Network |
| ALN | Allen Telecom, Inc. (Cleveland, OH) |
| ALN | Action League Now (gaming clan) |
| ALN | Action League Now (former gaming clan; TV series) |
| ALN | Adaptive Learning Network |
| ALN | Additional Learning Need |
| ALN | Access and Location Number |
| ALN | Ability Learning Network (Toronto, ON, Canada) |
| ALN | Art League North (Mt. Vernon, WA) |
| ALN | Automobile Loss Notice (insurance) |
| ALN | Availability Line Number |
| ALN | Albany and Northern Railway Company |
| ALN | St Louis Regional Airport, East Alton, IL |
| ALN | Australian Lawyers Network (Sydney, Australia) |