| AAL | anterior axillary line |
|---|---|
| ADSL | asymmetrical digital single line |
| AIDSLINE | on-line information on acquired immunodeficiency syndrome [MEDLARS data base] |
| ATL | Achilles tendon lengthening; acute T-cell leukemia; adult T-cell leukemia; anterior tricuspid leafle... |
| AVLINE | Audiovisuals On-Line [data base] |