What does Ap stand for?

Apex - Medicine (DMAA)

Apocalypse (BJA)

Apogam (SAUS)

Apologia - of Plato - Classical studies (OCD)

Apologia Socratis - of Xenophon - Classical studies (OCD)

Apostle (ADWA)

Apostolic (BJA)

Apparate (SAUS)

Applanation tonometry (SAUS)

April (RION)

Contra Apionem - Against Apion - Josephus (BJA)

Hymnus in Apollinem - of Callimachus - Classical studies (OCD)

New York Supreme Court, Appellate Division Reports - A publication (DLA)

Abeve Proof (SAUS)

Abingdon Press - Publisher

Abnormal Propagation (ELAL)

Aborting Procedure - Computer science (ELAL)

About Proof (WDAA)

Above Proof

Abrasive Paver (DICI)

Abruptio Placentae - Medicine (MELL)

Absolute Pardon (ADA)

Absolute Peak (SAUS)

Absolute Permeability (SAUS)

Absolute Permitivity (SAUS)

Absolute Pitch - Physiology

Absolute Power (ELAL)

Absolute Pressure (ELAL)

Absolute Programming - Computer science (ELAL)

Absorbed Power (SAUS)

Absorbing Power (SAUS)

Absorptive Power (SAUS)

Abyssal Plain (SAUS)

Academic Press, Inc. - Publishers

Academic Psychiatry (SAUS)

Academy of Periodontology (SAUO)

Accelerator Pedal - Automotive engineering

Accelerometer Package (KSC)

Accessory Pathway - Medicine (DMAA)

Access Panel - Technical drawings

Access Permit - or Permittee - Nuclear energy

Access Point - Telecommunications (TEL)

Access Prefix (SAUS)

Accidental Printing (SAUS)

Accion del Pueblo - Costa Rica - Political party (EY)

Accion Popular - Popular Action - Spain - Political party (PPE)

Accion Popular - Popular Action - Peru - Political party (PPW)

Accounting Period (SAUS)

Accounting Point (GFGA)

Account Paid

Accounts Payable

Accurate Programming (SAUS)

Acidification Potential - Recycling

Acid Phosphatase - Also, ACP, ACPH - An enzyme

Acidproof

Acinar Parenchyma - Medicine (EDAA)

Acoustic-Pressure (NVT)

Acquisition Plan

Acquisition Point (MUGU)

Acquisition Policy

Action Peace International (SAUO)

Action Plan (SAUS)

Action Post (SAUS)

Action Potential - of auditory nerve

Activator Protein

Active Parenting - Publishers (DHP)

Active/Passive (ACAE)

Acute Pain (MELL)

Acute Pancreatitis - Medicine (MELL)

Acute Panniculitis - Medicine (MELL)

Acute Parotitis - Medicine (MELL)

Acute Peritonitis - Medicine (MELL)

Acute Pneumonia - Medicine (MELL)

Acute Proliferative - or Proliferation (MAE)

Acyclic Process (SAUS)

Adapter Panel

Adding Punch (SAUS)

Additional Premium - Insurance

Addition Position (SAUS)

Additive Process (SAUS)

Add Packed - Computer science

Address Part (SAUS)

Address Portion (SAUS)

Address Printing (SAUS)

Adenomatous Polyp - Medicine (MELL)

Adenomatous Polyposis - Medicine (MELL)

Adenosis Pattern - Medicine

Adhesion Promoter - Electronics (AAEL)

Adhesion Proteoglycan - Biochemistry

Adjective (or Adjectival) Phrase (SAUS)

Adjective Phrase - Linguistics

Adjunct Processor (SAUS)

Adjustable Point (SAUS)

Adjustment and Preventative (MCD)

Administrative Procedure (NRCH)

Administrative Processor (TEL)

Administrative Publication - Navy

Admiralty Pattern - The right procedure, the correct thing to do - British

Adolescent Pregnancy - Medicine (MELL)

Adominal Pregnancy (MELL)

Adoratrici Perpetuae del Santissimo Sacramento - Nuns of the Perpetual Adoration of the Blessed Sacrament - Roman Catholic religious order

Adriamycin Cisplatin - Antineoplastic drug (CDI)

Advanced Park (SAUS)

Advanced Piloting - Nautical term (NTA)

Advanced Placement - Education

Advanced Post - Military

Advanced Pressurized - In name of nuclear reactor, AP 600, developed by Westinghouse Electric Corp.

Advanced Processor - Honeywell, Inc. (NITA)

Advanced Procurement (NG)

Advanced Purification - Chromatography

Advance Pay (MCD)

Advance Preparation (SAUS)

Advance Purchase Required - Also, AB - Airline fare code

Advertising Provider (WDMC)

Advice of Payment

Advisory Panel (SAUO)

Aerial Photography (AHDS)

Aerial Port

Aeropelican

Aeroplane Flag - Navy - British

Aerosol Protective (DICI)

Aero Spacelines - ICAO aircraft manufacturer identifier (ICAO)

Affirmative Procurement - Office of Environmental Management, Department of Energy (DEEM)

After Parturition (SAUS)

After Peak (MSA)

After Perpendicular (SAUS)

Aft Perpendicular - Naval engineering

Agency Procedure

Agent Profile - Computer science (GART)

Agrarian Party - Albania - Political party (EY)

Aiming Point

Airborne Platform (DWSG)

Aircraft Photo - Military

Air Passage (MSA)

Air Patrol (DNAB)

Air Pilot

Airplane

Airplane Pilot

Air Plot (DNAB)

Air Point (WDAA)

Air Police - By extension, a person who is a member of the Air Police

Air Pollution (KSC)

Airport

Air Position

Air Pressure (MCD)

Air Processing Subsystem (MCD)

Air Procuring Subsystein (SAUS)

Air Propeller - NCIC boat category code (NCIC)

Air Publication - Navy

Airway Pressure - Pulmonary ventilation

Alaska Power Administration (SAUO)

Alco Products, Inc. (SAUO)

Algorithmic Procedure (SAUS)

Alianza para el Progreso - Alliance for Progress - Washington, DC

Alianza Patriotica - Bolivia - Political party (EY)

Alianza Popular - Popular Alliance - Madrid, Spain (PPW)

Alignment Periscope

Alignment Procedures

Aliveness Project - HIV/AIDS - Minnesota (EARSL)

Alkaline Permanganate - Nuclear energy (NUCP)

Alkaline Phosphatase - Also, ALP - An enzyme

Alliance for Progress - OAS

Alliance Party - Fiji - Political party (EY)

Allied Publication

Alliston Procedure - Medicine (MELL)

Allophycocyanin - Also, APC - Biochemistry

All-Purpose

Almost Periodical (SAUS)

Alphanumeric Punching (SAUS)

Alpha Particle Spectrometer (KSC)

Alphaprodine - Anesthesiology

Altemeier's Procedure - Medicine (MELL)

Alternate Print (SAUS)

Alternative Patch (SAUS)

Alternative Poland - Defunct (EA)

Aluminum Perchlorate (MCD)

Aluminurn Perchlorate (SAUS)

Alum Precipitated - Medicine

Amanita Phalloides (MELL)

Ambush Patrol

American Paper Co.

American Party (SAUO)

American Patent (SAUS)

American Pioneer Lines - Steamship (MHDW)

American Plan - Hotel room rate

American Platinum, Inc. - Vancouver Stock Exchange symbol

American Poetry - A publication

American President Lines (SAUO)

American Pyschologist - A publication (SAUS)

Aminopeptidase - An enzyme (MAE)

Aminopurine - Biochemistry

Aminopyrine - An antipyretic and anesthetic

Ammonium Perchlorate - Inorganic chemistry

Ammunition Point

Ampco-Pittsburgh - NYSE symbol

Ampco-Pittsburgh Corp. - NYSE symbol (SPSG)

Amphibian Papilla - An auditory organ

Amusement Parks and Arcades - Public-performance tariff class - British

Amyloid Protein - Biochemistry

Amylopectinosis (MELL)

Anaihylactoid Purhura (SAUS)

Anal Pore

Analysis Processor (SAUS)

Analytical Plotter (GEOI)

Analytical Psychology

Anaphylactoid Purpura - Medicine

Anavatan Partisi - Motherland Parties (EAIO)

Ancient Parish

Ancient Petition

Andes Pact (SAUO)

Andhra Pradesh - State in southeast India

Andra Pradesh (SAUS)

- The Angel Planes - An association (EA)

Angina Pectoris - Medicine

Angle Point

Aniline Point - Measure of solvency

Anisotropy Parameter

Annals of Philosophy - A publication (BARN)

Annealing Point (MCD)

Annie People (EA)

Annual Pass - Disney (DIS)

Annual Plan

Annual Practice - A publication (DLA)

Annual Premium (MARI)

Annual Production (SAUS)

Annulus Pressurization

Anomalous Propagation - Telecommunications - Electronics (TEL)

Answer Print (NTCM)

Antarctica Project (EA)

Ante Partum - Obstetrics

Ante Prandium - Before Dinner - Pharmacy

Anterior Pituitary - Endocrinology

Anterior/Posterior - Medicine (AMHC)

Anteroposterior - Projection - Radiology (DAVI)

Anther Primordium - Botany

Anthithsonian Institution (SAUS)

Anthium (SAUS)

Anthropic Principle (SAUS)

Anticipations Point (ACAE)

Antidromic Potential - Medicine (DMAA)

Antipersonnel - Projectile

Antiperspirant (MELL)

Antiplasmin - Hematology

Antipyrine - Analgesic (AAMN)

Aorticopulmonary (ADWA)

Aortic Plexus - Anatomy

Aortic Pressure - Medicine

Aortopulmonar (SAUS)

Aortopulmonary - Cardiology

Aperture

Apical Meristem - Botany

Apical Pulse - Medicine

Apolda - German license plate city code

Apollo Program - NASA

Apostle

Apostleship of Prayer (EA)

Apothecary (WGA)

Apparent (ADA)

Appearance Potential - Physics

Appendectomy - Medicine

Appendicitis - Medicine (DAVI)

Appendix - Anatomy (DAVI)

Apple Pie - Internet lingo (CHAT)

Application/Adjunct Processor (SAUS)

Application Process - Telecommunications (OSI)

Application Processor (SAUS)

Application Program - Computer science (BUR)

Applications Processor (IEEE)

Applied Physics (IEEE)

Apply Pressure - Industrial engineering

Apprenticeship Program (DD)

Approach - Database terminology (NITA)

Approaches (NATG)

Approach Lights - Aviation (AIA)

Appropriate - Telegraphy (PCTE)

A Protester - To Be Protested - French - Business term

Apud - At, In the Works Of, According To - Latin

A Pulse (SAUS)

Aquagenic Pruritus - Medicine

Aquatic Plant

Aquisition Point (SAUS)

Aquisition Policy (SAUS)

Aramaic Papyri Discovered at Assuan - A publication (BJA)

Arbitrary Parameter (SAUS)

Arboreal Pollen (QUAC)

Arborescent Pollen (SAUS)

- The Archaeology of Palestine - A publication (BJA)

Archaeus Project (EA)

Archeus Project (SAUO)

Architectural Psychology Newsletter - British

Area Planning

Area Postrema (DB)

Argument Pointer (RALS)

Argument + Programming (SAUS)

Argument Programming (MSA)

Argyre Plamitia - A filamentary mark on Mars

Arithmetical Progression (SAUS)

Arithmetic Problem (SAUS)

Arithmetic Processor

Arithmetic Progression

Arithmetic Project - National Science Foundation

Arlington Park, IL - North American horse racing tracks (HRTC)

Armageddon Project - Later, AAAP (EA)

Armed for Anti-Personnel Attack (MILB)

Armed Forces Pacific

Armenia - NCIC country-territory code (NCIC)

Armor-Piercing - Ammunition

Army Panel (SAUS)

Army Pensions

Aromatic Polyamide (SAUS)

Array Processor - Computer science (BUR)

Arterial Presssure - Medicine (DHSM)

Artical Meristem (SAUS)

Artificial Personality

Artificial Pneumothorax - Medicine

Artificial Pupil (SAA)

Artist's Proof

Arum Pin - Medicine (MELL)

Ascent Phase

Ashpit - British (ROG)

Asking Price

Aspen Airways - ICAO designator (AD)

Aspiration Pneumonia - Medicine (MELL)

As Prescribed (AFM)

As Purchased

Assembly of Parties - INTELSAT

Assessment and Plans - Medicine

Assessment Paid - Billing

Asset Position

Assigned Personnel (SAUS)

Assignment of (Construction) Permit - FCC (NTCM)

Assignment Phase (SAUS)

Assignment Problem (SAUS)

Assistance Payments - Social Security Administration

Assistant Paymaster

Assistant Principal

Associated Parishes (EA)

Associated Period - Medicine (DAVI)

Associated Person - Stock exchange term

Associated Presbyterian - British (ROG)

Associated Press - News agency and wire service (EA)

Associated Publishers (EA)

Associate Presbyterian (IIA)

Associate Producer

Association for Psychotheatrics - Defunct (EA)

Association of Professions (SAUO)

Association Period (MAE)

Associative Processor - Computer science (BUR)

Assumed Position - Navigation

Assurance Problem

Atherosclerotic Plaque - Medicine (MELL)

Athey Products Corporation (EFIS)

Atmospheric and Space Physics (SAUS)

Atmospheric Pressure

Atomic Powered

Atrial Pacing (DB)

Atriopeptin - Biochemistry

Atrioventricular Pathway - Medicine (EDAA)

Atrium Pace - Cardiology

Attached Payload (SAUS)

Attached Processor - Computer science (BUR)

Attachment Plaque

Attack Plan (MCD)

Attack Plotter (NVT)

Attenuator Pad (SAUS)

Attitude and Pointing (MCD)

Attitude Processor (NASA)

Attitude Processor procurement, support and transportation (SAUS)

Audemars Piguet - Trademark for line of watches

Auditory Performance - Medicine (MELL)

Auditory Prosthesis - Medicine (MELL)

Auerbach's Plexus - Medicine (MELL)

Aurora Pump (SAUS)

Auteroposterior - Medicine (DHP)

Authority to Purchase (FOTI)

Author's Proof - Publishing

Automatic Pagination (VERA)

Automatic Pistol (SAUS)

Automatic Programming - Computer science

Automotive Products - Commercial firm - British

Auto Part (NRCH)

Auto Pilot (ACAE)

Auxiliary Patrol - British military (DMA)

Auxiliary Point (SAUS)

Auxiliary Police (LAIN)

Auxiliary Power (CAAL)

Auxiliary Printer (ECII)

Average Payable (SAUS)

Average Power (COE)

Average Price

Average Product - Economics

Aviapolk - Russian term for an air regiment

Aviation Pilot - Navy

Awaiting Parts

Award Processing - Social Security Administration (OICC)

Axiopulpal - Dentistry

Azimuth, Predicted (SAUS)

Ciba-Geigy - France - Research code symbol

L-Aspartyl-L-Phenylalanine (SAUS)

Nuns of Perpetual Adoration of Blessed Sacrament (TOCD)

Pakistan - Civil aircraft markings - international (PIPO)

Penhold Public Library, Alberta - Library symbol - National Library of Canada (NLC)

Popular Action (Peru) - Political party (PSAP)

Popular Alliance (Spain) - Political party (PSAP)

Transport - Navy ship symbol

Transport Ship (SAUS)

Additional Premium (WDAA)

Anni Praesentis - In the Present Year - Latin

ante post (SAUS)

Anterior Posterior - Medicine (QSUL)

Antiperiplanar - Chemistry

Apatite - CIPW classification - Geology

Apostle (VRA)

Apothecaries (SAUS)

Apothecary (ADWA)

Apple - Philately

Apud - In the Work Of - Latin (EES)

Attachment Point - Genetics (DOG)

Author's Proof - Publishing (WDMC)

Persian Gulf - MARC geographic area code - Library of Congress (LCCP)