| Acronym | Category | Meaning |
| CBO | Atmospheric Research Center Acronyms | Congressional Budget Office |
| CBO | Chemistry Acronyms | Coulomb Born Oppenheimer |
| CBO | Chemistry Acronyms | Corrected Born-Oppenheimer (in Calcns. For Mol. Complexes) |
| CBO | Chemistry Acronyms | Crude Born-Oppenheimer (wave Functions) |
| CBO | US Govt. Acronyms | Congressional Budget Office |
| CBOA | Chemistry Acronyms | Crude Born-Oppenheimer Approximation |
| CBOD | Chemistry Acronyms | Carbonaceous Biochemical Oxygen Demand |
| CBOL | Uncategorized Acronyms | Consortium For The Barcode Of Life |
| CBOX | Chemistry Acronyms | Coulomb-Born With No Exchange |
| CBP | Chemistry Acronyms | Combustion By-Product (from Incineration) |
| CBP | NASA Acronyms | Connector Bracket Power |
| CBR | Astronomy Acronyms | Cosmic Background Radiation |
| CBR | Chemistry Acronyms | Cosmic Background Radiation |
| CBR | Uncategorized Acronyms | Case-Based Reasoning |
| CBR | US Army Acronyms (Official) | Chemical-Biological-Radiological (see NBC); Charger Battery Relay |
| CBRA | Chemistry Acronyms | Coastal Barriers Resource Act |
| CBRF3 | NASA Acronyms | Bromotrifluoromethane (Fire-Extinguishing Material) |
| CBRN | Uncategorized Acronyms | Chemical |
| CBRNE | Chemistry Acronyms | Chemical, Biological, Radiological, Nuclear, Explosive |
| CBRNE | Uncategorized Acronyms | Chemical, Biological, Radiological, Nuclear, Explosive |
| CBRS | Atmospheric Research Center Acronyms | Coastal Barrier Resources System |
| CBS | Chemistry Acronyms | Complete Basis Set |
| CBS | Chemistry Acronyms | Cystathionine Beta-synthase |
| CBS | Medical Acronyms | Capillary Blood Sugar |
| CBS | NASA Acronyms | Connector Bracket Signal |
| CBS | Uncategorized Acronyms | Columbia Broadcasting System - Corps Battle Simulation |
| CBS-FCI | Chemistry Acronyms | Complete Basis Set-full Configuration Interaction |
| CBS-QCI | Chemistry Acronyms | Complete Basis Set-quadratic Configuration Interaction |
| CBSA | Chemistry Acronyms | Chlorobenzenesulfonic Acid |
| CBSA | NASA Acronyms | Cargo Bay Stowage Assembly |
| CBSS | Atmospheric Research Center Acronyms | Change Board Support System |
| CBT | Atmospheric Research Center Acronyms | Computer Based Training |
| CBT | Uncategorized Acronyms | Cognitive Behaviour Therapy -Combat |
| CBT | Medical Acronyms (Slang) | Chronic Burger/Biscuit Toxicity (obesity) |
| CBT | Computer And Internet Acronyms | Computer-Based Training |
| CBV | NASA Acronyms | Cabin Bleed Valve |
| CBW | NASA Acronyms | Constant Bandwidth |
| CBX | Chemistry Acronyms | Coulomb-Born Approxn. With Exchange |
| CBX | NASA Acronyms | C-Band Transponder |
| CBXT | Chemistry Acronyms | Community-Based Clinical Trial |
| CC | Chemistry Acronyms | Closed Cup (Flash Point Test Method) |
| CC | Chemistry Acronyms | Close Coupling Method (for Atom-molecule Collisions) |
| CC | Chemistry Acronyms | Combined Cycle |
| CC | Chemistry Acronyms | Coupled Channel |
| CC | Chemistry Acronyms | Coupled-cluster (quantum Calcn. Method) |
| CC | Medical Acronyms | Chief Complaint |
| CC | NASA Acronyms | Carbon-Carbon |
| CC | NASA Acronyms | Channel Controller |
| CC | NASA Acronyms | Chief Counsel (KSC Directorate) |
| CC | NASA Acronyms | Communications Control |
| CC | NASA Acronyms | Cost Center |
| CC | NASA Acronyms | Crew Compartment |
| CC | NASA Acronyms | Crew(s) Certified |
| CC | Uncategorized Acronyms | Many |
| CC | US Military Acronyms | Configuration Control |
| CC | Computer Acronyms (Common) | Carbon Copy |
| CC | Business And Finance | Cross Cutting |
| CC-CI | Chemistry Acronyms | Cluster Corrected-configuration Interaction |
| CC-CPA | Chemistry Acronyms | Charge-correlated CPA |
| CC-DQMC | Chemistry Acronyms | Clamped-coordinate Diffusion Quantum Monte Carlo |
| CC-EH | Chemistry Acronyms | Coupled-cluster Effective Hamiltonian |
| CC-LRT | Chemistry Acronyms | Coupled-cluster(-based) Linear Response Theory |
| CC-PV(D,T,Q) | Chemistry Acronyms | Correlation-consistent Polarized (double, Triple, Or Quadruple)-split Valence Basis Set |
| CC-VTZ | Chemistry Acronyms | Correlation Consistent-valence Triple Zeta (basis Set) |
| CC/RVDF | Chemistry Acronyms | Codex Committee On Residues Of Veterinary Drugs In Food |
| CCA | Chemistry Acronyms | Canonical Correspondence Analysis |
| CCA | Chemistry Acronyms | Channel Coupling Array (quantum Theory For Atoms And Mols.) |
| CCA | Chemistry Acronyms | Close-coupling Approximation |
| CCA | Chemistry Acronyms | Convex Constraint Analysis |
| CCA | Chemistry Acronyms | Copper Chromium Arsenic |
| CCA | Chemistry Acronyms | Coupled-cluster Approach |
| CCA | Chemistry Acronyms | Crystalline Cluster Approach (in Electronic Structure Calcns.) |
| CCA | Chemistry Acronyms | Crystalline Colloidal Array |
| CCA | NASA Acronyms | Communications Carrier Assembly |
| CCA | NASA Acronyms | Communications Carrier Assembly |
| CCA | NASA Acronyms | Contract Change Authorization |
| CCA | NASA Acronyms | Contract Change Authorization |
| CCA | NASA Acronyms | Coolant Control Assembly |
| CCA | Uncategorized Acronyms | Counter Command Activity |
| CCA | US Military Acronyms | Carrier Controlled Approach |
| CCA | US Military Acronyms | Circuit Card Assembly |
| CCA | US Military Acronyms | Critical Characteristics Audit |
| CCAA | Atmospheric Research Center Acronyms | Canadian Clean Air Act |
| CCAA | Chemistry Acronyms | Canadian Clean Air Act |
| CCAB | Atmospheric Research Center Acronyms | CGD Computing Advisory Board |
| CCAFS | Astronomy Acronyms | Cape Canaveral Air Force Station |
| CCAFS | NASA Acronyms | Cape Canaveral Air Force Station |
| CCAFS | NASA Acronyms | Cape Canaveral Air Force Station |
| CCAM | Chemistry Acronyms | Charge-conserving Approxn. Method (for Quantum Calcns.) |
| CCAP | Chemistry Acronyms | Cancer Chromosome Aberration Project |
| CCAP | Chemistry Acronyms | Center For Clean Air Policy |
| CCAP | Chemistry Acronyms | Climate Change Action Plan |
| CCAP | Chemistry Acronyms | Crustacean Cardioactive Peptide |
| CCAR | Atmospheric Research Center Acronyms | Colorado Center For Astrodynamics Research |
| CCARS | Atmospheric Research Center Acronyms | Computer Controlled Automatic Rain Sampler |
| CCATS | NASA Acronyms | Command |
| CCAWG | Atmospheric Research Center Acronyms | Climate Change And Assessment Working Group |
| CCB | Atmospheric Research Center Acronyms | Center For Capacity Building |
| CCB | Atmospheric Research Center Acronyms | Change Control Board |
| CCB | Atmospheric Research Center Acronyms | Configuration Control Board |