ALTB
| Acronym | Definition |
|---|---|
| ALTB | Airborne Laser Test Bed (missile defense) |
| ALTB | Actief Leren Transparant Beoordelen (Dutch: Transparent Active Learning Rate) |
| ALTB | Acute Laryngotracheobronchitis |
| ALTB | Arnhemsche Lawn Tennis Bond (Dutch: Arnhem Schenardi Federal Lawn Tennis) |