| Acronym | Meaning |
| CAMP | Continuous Air Monitoring Program |
| CAMP | Cyclic Adenosine Monophosphate |
| CAMRAQ | Consortium For Advanced Modeling Of Region Air Quality |
| CAMU | Corrective Action Management Unit |
| CAMV | Cauliflower Mosaic Virus |
| CAN | Ceric Ammonium Nitratepar |
| CAN | Cellulose Acetate Nitrate |
| CANDA | Computer Aided New Drug Application |
| CANDI | Carbon And Nutrient Diagenesis |
| CANDU | Canadian Deuterium-Uranium Reactor |
| CANMET | Canada Centre For Mineral And Energy Technology |
| CANS | Combination Area Neutron Spectrometer |
| CAOPM | Configuration-averaged Optimized-potential Model |
| CAOS | Computer Assisted Organic Synthesis |
| CAP | Compliance Audit Program |
| CAP | Consolidation By Atmospheric Pressure |
| CAP | Capacity Assurance Plan |
| CAP | Cellulose Acetate Propionate |
| CAP | Complex Absorbing Potential |
| CAP | Continuous Absorption Process |
| CAP | Corrective Action Plan |
| CAP88-PC | Clean Air Act Assessment Package-1988 |
| CAPA | Critical Aquifer Protection Area |
| CAPCA | Closure And Postclosure Activity |
| CAPCOA | California Air Pollution Control Officers Association |
| CAPD | Continuous Ambulatory Peritoneal Dialysis |
| CAPE | Convective Available Potential Energy |
| CAPMON | Canadian Air And Precipitation Monitoring Network |
| CAPP | Computer Aided Process Planning |
| CAPS | 3-(cyclohexylamino)-1-propanesulfonic Acid |
| CAPS | Cleaved Amplified Polymorphic Sequence |
| CAPS | Computer-assisted Problem Solving |
| CAPTEX | Cross-Appalachian Tracer Experiment |
| CAQ | Computer Aided Quality Assurance |
| CAR | Chemically Amplified Resist |
| CAR | Computer Aided Retrieval |
| CARA | Chemical Assessments And Related Activities |
| CARB | California Air Resources Board |
| CARBASHD | Carbon-relayed Band-selected Homonuclear-decoupled |
| CARCA | Computer-assisted Rocking Curve Analysis |
| CARD | Caspase Recruitment Domain |
| CARD | Contract Laboratory Program Analytical Results Database |
| CARE | Computed-aided Risk Evaluation |
| CAREIRS | Conversion And Renewable Energy Inquiry And Referral Service |
| CARER | Center For The Advancement Of Radiation Education And Research |
| CARES | Ceramic Analysis And Reliability Evaluation Of Structures |
| CARIBIC | Civil Aircraft For Remote Sensing And In Situ Measurements In Troposphere And Lower Stratosphere Based On The Instrumentation |
| CARL | Colorado Association Of Research Libraries |
| CARL | Collective Atomic Recoil Laser |
| CARM | Cyclotron Autoresonance Maser |