ABR
- ASL Airlines Ireland
- Abercynon North railway station
- Aberdeen Regional Airport
- Abr
- Abron dialect
- Adaptive bit rate
- Addison Brown
- American Board of Radiology
- Athens Line
- Auditory brainstem response
- August Burns Red
- Australian Biblical Review
- Australian Book Review
- Australian Business Number
- Available Bit Rate
- Average bitrate
- National Association of Realtors
- Open Shortest Path First