is an abbreviation for:
- Earned Run Average (E.R.A.), a baseball statistic
- Earth Rotation Angle
- E-business Regulatory Alliance
- ECMWF Re-analysis
- Education Reform Act
- Effective Rates Of Assistance
- Electronic Remittance Advice
- Engineering Research Associates , a pioneering computer firm from the 1950s
- Engine Room Artificer
- English Racing Automobiles , a manufacturer of racing cars
- Enhanced Rescission Authority , also known as " Line Item Veto "
- Entertainment Retailers' Association
- Equal Rights Amendment , a proposed, but unratified, USA constitutional amendment
- American Equal Rights Association
- Eramet , a company with exchange symbol ERA
- Ethiopian Roads Authority
- Études Et Recherches Acoustiques , a French audiophile manufacturer from the 1970s
- European Academy Of Law , located in the German city of Trier
- European Railway Agency
- European Robotic Arm , a robot arm for use on the International Space Station
- European Research Area
- European Regions Airline Association , an association for aviation businesses
- Explosive Reactive Armour , a type of vehicle armor
- Energy Resources Of Australia , a mining company owned by the Rio Tinto Group
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