CPA
- Australia Post
- CPA (agriculture)
- CPA Australia
- CPA Canada
- CPA superfamily
- Canadian Payments Association
- Canadian Payroll Association
- Canadian Pickleball Association
- Canadian Police Association
- Canadian Poolplayers Association
- Canadian Psychological Association
- Care Programme Approach
- Cathay Pacific
- Catholic Patriotic Association
- Centre de perfectionnement aux affaires
- Centre for the Performing Arts, Adelaide
- Cerebellopontine angle
- Certified Practising Accountant
- Certified Public Accountant
- Chartered Patent Attorney
- Chartered Professional Accountant
- Chinese Progressive Association (Boston)
- Chiral phosphoric acid
- Chirped pulse amplification
- Chosen-plaintext attack
- Christian Peoples Alliance
- Chronic pulmonary aspergillosis
- Classification of Products by Activity
- Climate Pledge Arena
- Co-citation Proximity Analysis
- Coalition Provisional Authority
- Coalition for a Prosperous America
- Coherent perfect absorber
- Coherent potential approximation
- Collaborative practice agreement
- College Park Academy
- Commercial Product Assurance
- Commission on Preservation and Access
- Commonwealth Parliamentary Association
- Communist Party USA
- Communist Party of Arakan
- Communist Party of Australia
- Communist Party of Australia (1971)
- Community Preservation Act
- Comprehensive Peace Accord
- Comprehensive Peace Agreement
- Comprehensive Performance Assessment
- Comprehensive Plan of Action
- Congress Party Alliance
- Consumer Protection Association
- Continuous partial attention
- Continuous payment authority
- Cost per action
- Cost per activity
- Council of Presidential Advisers
- Craft Potters Association
- Critical path analysis
- Cyclopropane fatty acid
- Cyproterone acetate
- Cyprus Ports Authority
- EbXML
- Extreme Dodgeball
- N6-Cyclopentyladenosine
- PAC (disambiguation)