AAL
- ATM Adaptation Layers
- Aal (Kocher)
- Aal (film)
- Aalborg Airport
- Aboriginal Advancement League
- Above Aerodrome Elevation
- Abstract algebraic logic
- Adelaide Airport Limited
- Afade language
- Against All Logic
- Aid Association for Lutherans
- Ambient Assisted Living
- American Airlines
- American Airlines Group
- American Arena League
- Anglo American plc
- Animals as Leaders
- Anterior Axillary Line
- Arjen Anthony Lucassen
- Attorney at law
- Australian Aborigines' League
- Australian Academy of Law
- Australian Air League
- Automated Anatomical Labeling
- Johannes Aal
- Morinda citrifolia
- Morinda tinctoria
- Ål