ARB
- ARB (Azerbaijani TV channel)
- ARB (band)
- ARB (martial art)
- ARB 24
- ARB Günəş
- ARB Project
- ARB assembly language
- Accounting Principles Board
- Accumulative roll bonding
- Administrative Review Board
- Administrative Review Board (Labor)
- Air Rescue Boat
- Air Resources Board
- Amanah Raya Berhad
- American Research Bureau
- Angiotensin II receptor blocker
- Ann Arbor Municipal Airport
- Ann Arbor station
- Anti-roll bar
- Arb (gesture)
- Arbitrary unit
- Arbroath railway station
- Architects Registration Board
- Arth-Rigi-Bahn
- Australian Racing Board
- Breton Revolutionary Army
- Fast Library for Number Theory
- List of auxiliaries of the United States Navy
- List of auxiliaries of the United States Navy
- Modern Standard Arabic
- OpenGL Architecture Review Board
- Primoris Services Corporation
- Royal Academies for Science and the Arts of Belgium