| A&PS | Administration and Program Support (MSFC Directorate) 
| Others |
| APS | Ability Point Skill
| Others |
| APS | Absolute Pressure Sensor
| Others |
| APS | Absolute Print Signature
| Others |
| APS | Absolutely Precious Skin
| Others |
| APS | Academic Program Summary
| Others |
| APS | Academic Programs and Services
| Others |
| APS | Academic Publishing Service
| Others |
| APS | Academy of Political Science
| Others |
| APS | Accelerated Promotion Scheme
| Others |
| APS | Acceleration and Pre-Separation
| Others |
| APS | Accelerator Position Sensor
| Others |
| APs | Access Points
| Others |
| APS | Accessible Pedestrian Signal
| Others |
| APS | Accessible Pedestrian Signals
| Others |
| APS | Accredited Platform Specialist
| Others |
| APS | Acele Posta Servisi
| Others |
| APS | Acoustic Parking System
| Others |
| APS | Acoustic Polarised Stereo
| Others |
| APS | Acquisition Processor Subsystem
| Others |
| APS | Acta Pharmacologica Sinica
| Others |
| APS | Acting Police Sergeant
| Others |
| APS | Action Potential Simulation
| Others |
| APS | Active Perfuming System
| Others |
| APS | Active Phase Switching
| Others |
| APS | Active Pixel Sensor
| Others |
| APS | Active Point System
| Others |
| APS | Active Positive Symbiosis
| Others |
| APS | Active Protection System
| Others |
| APS | Adac Procar Serie
| Others |
| APS | Adapter protein with Pleckstrin homology and SRC homology 2 domains
| Others |
| APS | Adaptive Pixel Subdivision
| Others |
| APS | Adaptive Pneumatic Suspension
| Others |
| APS | Adjustable Pedal System
| Others |
| APS | Adjustment Processing System
| Others |
| APS | Administration Planning and Statistics
| Others |
| APS | Admission Point Score
| Others |
| APS | Adobe Livecycle Policy Server
| Others |
| APS | Adobe Photo Shop
| Others |
| APS | Adobe Post Script
| Others |
| APS | Adult Protective Services
| Others |
| APS | Advance Performance System
| Others |
| APS | Advanced Password Systems
| Others |
| APS | Advanced Performance Supplement
| Others |
| APS | Advanced Photo System
| Others |
| APS | Advanced Photographic System
| Others |
| APS | Advanced Photon Source
| Others |
| APS | Advanced Pixel Shader
| Others |
| APS | Advanced Planning and Scheduling
| Others |
| APS | Advanced Planning System
| Others |
| APS | Advanced Planning Systems
| Others |
| APS | Advanced Positioning Sensor
| Others |
| APS | Advanced Power Stability
| Others |
| APS | Advanced Power System
| Others |
| APS | Advanced Practice Strategies
| Others |
| APS | Advanced Printing Service
| Others |
| APS | Advanced Prison Sanctions
| Others |
| APS | Advanced Production System
| Others |
| APS | Advanced Program Settings
| Others |
| APS | Advanced Propagation System
| Others |
| APS | Aerial Port Squadron
| Others |
| APS | Aerodynamic Particle Sensor
| Others |
| APS | Affordable Portable Services
| Others |
| APS | Afloat Pre-positioning Ship
| Others |
| APS | Agenda Productivity Suite
| Others |
| APS | Agreement of Purchase and Sale
| Others |
| APS | Agricultural Production Specialist
| Others |
| APS | Air Precision Shooting
| Others |
| APS | Air Processing System
| Others |
| APS | Air Purification System
| Others |
| APS | Airway Planning Standard
| Others |
| APS | Akron Public Schools
| Others |
| APS | Albuquerque Public School
| Others |
| APS | Albuquerque Public Schools
| Others |
| APS | All Processes Suspended
| Others |
| APS | All Professional and S**t
| Others |
| APS | All Programs and Sounds
| Others |
| APS | Allison Payment Systems
| Others |
| APS | Alternate Payload Specialist
| Others |
| APS | Alternative Portfolio Standard
| Others |
| APS | Always Personal Service
| Others |
| APS | Amateur Pageantry Systems
| Others |
| APS | Ambient Pressure Sensor
| Others |
| APS | American Pain Society
| Others |
| APS | American Pediatric Society
| Others |
| APS | American Peptide Society
| Others |
| APS | American Philatelic Society
| Others |
| APS | American Philosophical Society
| Others |
| APS | American Physical Society
| Others |
| APS | American Physical Society's
| Others |
| APS | American Physiological Society
| Others |
| APS | American Phytopathological Society
| Others |
| APS | American Psychological Society
| Others |
| APS | American Psychosomatic Society
| Others |
| APS | Amg Performance Studio
| Others |
| APS | Anaerobic Phased Solids
| Others |
| APS | Analog Protection System
| Others |
| APS | Analytical Planning and Scheduling
| Others |
| APS | Angell Park Speedway
| Others |
| APS | Animal Protection Services
| Others |
| APS | Animal Protection Society
| Others |
| APS | Animated Polymer System
| Others |
| APS | Annapolis Performance Sailing
| Others |
| APS | Anonymity, Privacy & Security
| Others |
| APS | Anonymizer Proxy Server
| Others |
| ApS | Anpartsselskab (Danish term for a limited liability company)
| Others |
| APS | Antennas and Propagation Society
| Others |
| APS | Anti Pronation System
| Others |
| APS | Anti-Phospholipid Syndrome
| Others |
| APS | Anti-Pressure Surge
| Others |
| APS | AOL Password Stealer
| Others |
| APS | Apartment Protected Space
| Others |
| APS | Apple Professional Services
| Others |
| APS | Application Performance Standard
| Others |
| APS | Application Print Services
| Others |
| APS | Application Processing Services
| Others |
| APS | Application Protection System
| Others |
| APS | Application Provided Sublayer
| Others |
| APS | Application Provider Services
| Others |
| APS | Application Server
| Others |
| APS | Application Studio File
| Others |
| APS | Applied Problem Solving
| Others |
| APS | Approved Practitioner Status
| Others |
| APS | Approved Program Sequence
| Others |
| APS | Approved Provider Standard
| Others |
| APS | AquaBio Products Sciences
| Others |
| APS | Arizona Public Service
| Others |
| APS | Arlington Public Schools
| Others |
| APS | Armor Protection System
| Others |
| APS | Army Planning System
| Others |
| APS | Army Pre-positioned Stocks
| Others |
| APS | Army Public School
| Others |
| APS | Arrayable Point Source
| Others |
| APS | Art Protection Squad
| Others |
| APS | Art Publishing System
| Others |
| APS | As Per Sample
| Others |
| APS | ASARS (Advanced Synthetic Aperture Radar System) Processing Segment
| Others |
| APS | Ashburton Primary School
| Others |
| APS | Asian Parent Syndrome
| Others |
| APS | Assembly Programming System
| Others |
| APS | Asset Positioning System
| Others |
| APS | Assisted Parking System
| Others |
| APS | Association for Practical Shooting
| Others |
| APS | Association for Psychological Science
| Others |
| APS | Association of Planning Supervisors
| Others |
| APS | Association Parking Solidaire
| Others |
| APS | Astronomy & Planetary Science
| Others |
| APS | Asynchronous Port Switch
| Others |
| APS | Asynchronous Protocol Specification
| Others |
| APS | Atlanta Public Schools
| Others |
| APS | Atlantic Protective Services
| Others |
| APS | Atmospheric Pressure Sensor
| Others |
| APS | Attending Physician Statement
| Others |
| APS | Attending Physician's Statement
| Others |
| APS | Attorneys' Process Service
| Others |
| APS | Audi Parking System
| Others |
| APS | Audi Pre Sense
| Others |
| APS | Audi Production System
| Others |
| APS | Audible Pedestrian Signals
| Others |
| APS | Augmented Phrase Structure
| Others |
| APS | Augmented Protein System
| Others |
| APS | Aurora Public Schools
| Others |
| APS | Australian Psychological Society
| Others |
| APS | Australian Public Service
| Others |
| APS | Authorization for Personal Services
| Others |
| APS | Authorization Proxy Server
| Others |
| APS | Authors Promoting Success
| Others |
| APS | Auto Pilot System
| Others |
| APS | Auto Power Spectrum
| Others |
| APS | Autocar Performance Show
| Others |
| APS | Autologous Protein Solution
| Others |
| APS | Automated Patient System
| Others |
| APS | Automated Payload Switch
| Others |
| APS | Automated Planning and Scheduling
| Others |
| APS | Automated Position System
| Others |
| APS | Automated Process Scheduler
| Others |
| APS | Automatic Paper Selection
| Others |
| APS | Automatic Parking System
| Others |
| APS | Automatic Payroll Systems
| Others |
| APS | Automatic Performance System
| Others |
| APS | Automatic Pilot System
| Others |
| APS | Automatic Point and Shoot
| Others |
| APS | Automatic Power Shift Transmission
| Others |
| APS | Automatic Program Selection
| Others |
| APS | Automatic Progressive Scanning
| Others |
| APS | Automatic Protection Switching
| Others |
| APS | Automatic Provisioning System
| Others |
| APS | Automobile Parts and Suppliers
| Others |
| APS | Automotive Paint Supply
| Others |
| APS | Automotive Parts Solutions
| Others |
| APS | Automotive Performance Systems
| Others |
| APS | Auxiliary Police Section
| Others |
| APS | Auxiliary Power Supply
| Others |
| APS | Auxiliary Power System
| Others |
| APS | Average Point Score
| Others |
| APS | Average Points Scored
| Others |
| APS | Average Price System
| Others |
| APS | Aviation Performance Solutions
| Others |
| APS | Avtomat Podvodny Spetsialny
| Others |
| APS | Avtomat Podvodny Spetsialnyy
| Others |
| APS | Avtomat Podvodnyy Spetsialnyy
| Others |
| APS | Awesome Penny Stocks
| Others |
| APS | Awnings Pegs Supplies
| Others |
| APS | Institute of Electrical and Electronic Engineers Antennas and Propagation Society
| Others |