Class A
- A class (disambiguation)
- Airspace class
- Army Service Uniform
- Class A (baseball)
- Class A (classification)
- Class A (novel)
- Class A airfield
- Class A drug
- Class A network
- Class A office space
- Class A share
- Class A surface
- Class A television service
- Class B (disambiguation)
- Class-A amplifier
- Driver's licenses in the United States
- Milwaukee Road class A
- Motorhome
- Norfolk and Western Railway class A
- Stellar classification