ERP

ERP may stand for:

;Communication:
* Effective radiated power, used in radio communications
* European Radio Project, a consortium of radio broadcasters working on a European public radio station.

;Economics:
* Economic Report of the President, published annually by the United States President's Council of Economic Advisors on recent economic activity and future policies and predictions.
* Effective rate of protection, a method of working out the value of import tariffs

;Geography:
* Erp, Ariège, a village in southern France
* Erp (Germany), a village near Cologne
* Erp (Netherlands), a town

;Information Technology (IT):
* Enterprise resource planning, an Information Technology term referring to a hardware or software system that serves all departments within an enterprise

;Medicine:
* Effective Refractory Period, (Medicine- Cardiac electrophysiology)

;Physics:
* Event-related potential, an electrophysiological response to an internal or external stimulus

;Politics and history:
* Erp (Pict), a famous Pict
* Electronic Road Pricing, toll-collection scheme in Singapore
* Estonian Reform Party
* The Marshall Plan, the official name of which was the European Recovery Program.
* Ejército Revolucionario del Pueblo, a disambiguation page

;Psychology:
* Evoked (response) potential: A psychology research method in which elecrical activity of the brain is measured via electrode recordings obtained from the scalp. The subject wears a 'cap' of electrodes.
* Exposure and response prevention, a psychotherapeutic method

;Sexuality:
* Erotic Role-playing, a sexual form of Role-playing