Civil Air Patrol, the official US Air Force Auxiliary

A nickname for Captain America

Common Agricultural Policy, the European Union's agricultural subsidy system.

A crown (dentistry) is sometimes called a cap.

Capacitor, in electronics slang

Salary cap

Community-acquired pneumonia

Digital subscriber line speed cap

Caspar Weinberger, his nickname

A cervical cap contraceptive device.

Polar ice cap

Capricornus (constellation), standard astronomical abbreviation

Center for American Progress, a left-of-center think tank

short for the capabilities which are central to capability-based security

Pipe cap, a pipe fitting used to seal the end of a pipe

Non-economic damages caps

Centre d'Analyse et de Programmation, a French software company (now part of Capgemini)

Percussion cap, a small amount of percussion-sensitive explosive, held in a tape or small cup

Capturing the flag.

ChildCare Action Project

Fuel filler cap

Short for Captain

Concerned Alumni of Princeton

Catabolite Activator Protein

Interest rate cap

A small, powdered compound used to make noise and smoke in a cap gun.

Canadian Action Party

An upper bound:

Central Arizona Project Aqueduct

Combat air patrol

Combat Air Patrol

Common Alerting Protocol

Therapy cap

Market capitalization (e.g., "large cap", "small cap")

Coded Anti-Piracy, an anti-piracy system for motion picture prints exhibited theatrically.

California Assessment Program, a California standards test replaced by the California Learning Assessment System, which was in turn replaced by the STAR system.

Comité voor een Andere Politiek / Comité pour une Autre Politique (Belgian political movement)

Christian Appalachian Project a faith-based program to assist disadvantaged persons in the Appalachian region of Kentucky and West Virginia

Camel Application Part, a protocol used in CAMEL servers.

Capping inversion, inhibits atmospheric convection

Caps summary and related information.

Canadian Association of Physicists

CAP, the Cyclase Associated Protein

Carrierless Amplitude Phase Modulation

Community Action Program, Lyndon Johnson's anti-poverty programs.

Christians Against Poverty, the UK charity

College of American Pathologists

Central Atlanta Progress

Church Action on Poverty, UK national ecumenical social justice charity established in 1982

Apex Aircraft's range of CAP training and aerobatic aircraft.

Chicago Area Project, a juvenile delinquency project

Claims Assistance Professional, medical billing assistance and patient advocacy

Tax cap

5' cap, in biology, a part of an mRNA

Cap, a headgear

Bottle cap, a device to seal glass bottles

Camper shell, a type of caravan

Cap (sport), awarded in some sports when a player represents his country

Cap and Gown Club, an eating club at Princeton University

Vladislao Cap an Argentine footballer

Carlos Andres Pérez, a Venezuelan president.

Certification and Accreditation Professional, Information assurance certification offered by (ISC)²

Computer Analysts and Programmers (CAP Group), a UK software company founded in the 60s which became part of Sema Group

Consolidated Appeals Process a funding mechanism used by humanitarian aid organisations.

CAP is the ICAO airline designator for Capital Airlines, United States