AP, Ap, A&P, or A/P may refer to:

• "AP" (song), by Pop Smoke, 2021
• Action point, a video game term
• AP, a character in animated TV series Atomic Puppet
• "A&P" (short story), by John Updike, 1961
• Alternative Press (magazine), an American entertainment magazine
• Ang Pamantasan, a Philippine student publication
• Palatine Anthology, or Anthologia Palatina, a collection of Ancient Greek poems
• Amiga Power, a defunct video games magazine

• Academic Press, an American academic publisher
• Amalgamated Press, a former British newspaper and magazine publishing company
• Associated Press, an American news agency
• A&P, the Great Atlantic & Pacific Tea Company, a former American chain of grocery stores
  • A&P Canada, former supermarket chain
• A&P Group, a British ship repair company
• Austin & Pickersgill, a British shipbuilding company
• Air One, an Italian airline, IATA code AP
• Atlantic and Pacific Railroad, in the United States
• Audemars Piguet, Swiss watchmaker
• Automotive Products, a former British company

• Acción Popular (disambiguation), the name of several parties
• Justice Party (Turkey) (Turkish: Adalet Partisi)
• Justice Party (Turkey, 2015)
• People's Action (Romania) (Romanian: Acțiunea Populară)
• People's Alliance (Spain) (Spanish: Alianza Popular)
• Labour Party (Norway) (Norwegian: Arbeiderpartiet)

• Armenian Power, an Armenian criminal gang in Los Angeles, U.S.
• Atlantic Philanthropies, a private foundation
• Dutch Data Protection Authority (Dutch: Autoriteit Persoonsgegevens)
• Polish Aero Club (Polish: Aeroklub Polski)

• AP (rapper) (Yohann Duport, born 1979), French rapper
• Adrian Peterson, former American football running back
• Arthur Paul Harper (1865–1955), New Zealand lawyer, mountaineer, explorer, businessman, known as AP
• ap ('son of'), part of a Welsh patronymic
• a/p ('daughter of'), in Malaysian Indian names

• Amapá, Brazil, ISO code BR-AP
• Andhra Pradesh, India, ISO code IN-AP
• Province of Ascoli Piceno, Italy, vehicle registration code

• AP, an alternative characterization of PSPACE In computational complexity theory
• Application Processor, usually means CPU
• Wireless access point, or access point, a networking hardware device
• Address plus Port (A+P), a technique for sharing IPv4 addresses
• ActivityPub

• Acute pancreatitis, a sudden inflammation of the pancreas
• Area postrema, a part of the brain
• Colporrhaphy or A&P repair, of vaginal walls

• Ammonium perchlorate, an inorganic compound
• Ap and Bp stars
• AP site, a location in DNA or RNA
• Armour-piercing ammunition

• All Purpose, a common grade of wheat flour
• Ap (water), a Vedic Sanskrit term
• ap, a classical abbreviation for ad pedes or aedilitia potestate
• AP, a classification symbol for an auxiliary of the United States Navy
• AP and variants, several medical abbreviations
• A&P mechanic, an aircraft maintenance technician with airframe and powerplant ratings
• Absolute pitch, the ability to identify a musical note without a reference tone
• Accounts payable, in accounting
• Advanced Placement, North American program offering college-level courses at schools
• Adjective phrase, a phrase whose head is an adjective
• Agricultural and Pastoral Shows, in New Zealand
• Attachment parenting, a parenting philosophy
• Hungarian adópengő, a former currency, symbol AP

• All pages with titles beginning with AP
• All pages with titles beginning with Ap
• All pages with titles containing ap
• Great Atlantic & Pacific Tea Company (disambiguation)
• APP (disambiguation)
• APS (disambiguation)
• Argyle Park, a band reformed under the name AP2