ERP

ERP or Erp may refer to:

Economics

 * Effective rate of protection, of tariffs
 * Equity risk premium, excess return on risky investments
 * European Recovery Program or Marshall Plan

Science and technology

 * Effective radiated power, of directional radio transmission
 * Electronic Road Pricing, in Singapore
 * Enterprise resource planning, a business process system

Medicine

 * Effective refractory period, in a cardiac cycle
 * Estrogen receptor positive, a cancer pathology test result
 * Event-related potential, a measured brain response
 * Exposure and response prevention, a treatment method in behavioral therapy
 * OspE/F-like related protein, in Lyme disease microbiology

Places

 * Erp, Ariège, a village in France
 * Erp (Germany), a village
 * Erp, Netherlands, a town

Other uses

 * Erp (Pict), father of Drest I of the Picts
 * Ejército Revolucionario del Pueblo (disambiguation), (Spanish for People's Revolutionary Army), several Latin American communist or socialist organizations
 * Energy-related products, that use or affect energy consumption
 * Erotic roleplay, roleplay that is intended to arouse sexual desire