| Concept Design Academy | Academic & Science |
| Association Dentaire Canadienne | Academic & Science |
| Association canadienne des barrages | Academic & Science |
| Canadian Dam Association | Academic & Science |
| Cosmic Dark Ages | Academic & Science |
| Cooinda | Airport Code |
| Childrens Detention Agency | Business |
| Cordiant Communications Group | Business |
| Career Development Award | Business |
| Codan, LTD., ordinary stock | Business |
| Canadian Dental Association | Business |
| Canadian Dermatology Association | Business |
| Chidren Detcetion Agency | Business |
| Cyber Dog Association | Business |
| Central Domain Administration | Business |
| Clean Dry Air | Chemistry |
| Child Development Associate | Community |
| Coventry District Association | Community |
| Community Development Agency | Community |
| Community Data Access | Community |
| Copier Dealers Association | Community |
| Census Designated Area | Community |
| Community Development Administration | Community |
| Community Development Assistant | Community |
| California Delivery Association | Community |
| Child Development Associates | Community |
| Combined Development Agency | Community |
| Charity and Development Appeal | Community |
| Child Development Association | Community |
| Cooperative Development Authority | Community |
| Convenience Distribution Association | Community |
| Cleveland Development Advisors | Community |
| Creature Debate Association | Community |
| Creating Dropout Alternatives | Community |
| Community Design Architecture | Community |
| Critical Discourse Analysis | Community |
| Compact Disc Audio | Computer Hardware |
| Clinical Document Architecture | Computing |
| Central Design Activity | Computing |
| Compound Document Architecture | Computing |
| Cd Archiving | Computing |
| Content Delivery Applications | Computing |
| Cisco Desktop Administrator | Computing |
| Call Data Accumulator | Computing |
| Capability Data Acknowledgment | Computing |
| Crash Dump Analyzer | Computing |
| Continuous Delivery Architect | Computing |
| Cybersecurity Defense Analysis | Computing |
| Critical Damping Adjustment | Electronics |
| Copper Development Association | Electronics |
| Cd Audio Track | File Type |
| Crimson Dawn Alliance | General |
| Candidate Development Award | General |
| Collin D Anderson | General |
| Congenital Dyserythropoietic Anemia | General |
| Chandra Data Archive | General |
| Call Disposition Analyzer | General |
| Chemically Dependent Anonymous | General |
| Characteristic Defining Ability | General |
| Circadian Dip in Alertness | General |
| California Department of Aging | General |
| Chen Design Associates | General |
| Cylinder De-Activation | General |
| Car Distributors Assembly | General |
| Curve Dynamic Assist | General |
| Cite De l'Automobile | General |
| Comfort and Driving Assistance | General |
| Cooperative Driver Assistance Application | General |
| Coil Driver A | General |
| Chicago Department of Aviation | General |
| Car Design Award | General |
| Coeur d'Alene | General |
| Car Design Academy | General |
| Comision Deportiva Automovilistica | General |
| Coeur d | General |
| Car Design Archives | General |
| Committed Drivers Association | General |
| Centro Diagnostico Automotor | General |
| Coupe Des Alpes | General |
| City Driving Assist | General |
| Coefficient of Drag Area | General |
| Compact Disk Audio | General |
| Capital Dividend Account | General |
| Capital Divisiondend Account | General |
| Controlled Droplet Application | General |
| Cascadian Dark Ale | General |
| Cosmic Dust Analyzer | General |
| Colorado Department of Agriculture | General |
| Clara Dunn Armstrong | General |
| Country Digital Acceleration | General |
| Clara Dunn and Armstrong | General |
| Categorical Data Analysis | General |
| Country Digitization Acceleration | General |
| Commission Disbursement Authorization | General |
| Compressed Dry Air | General |
| Communications Design Associates | General |
| Central District Ambulance | General |
| Center for Democracy in the Americas | General |
| Country Digitization Application | General |
| Can Do Attitude | General |
| Compact Digital Audio | General |
| Controlled Descent Apparatus | General |
| Cannot Do Anything | General |
| Cofficient of Dynamic Augment | General |
| Child Developement Associate | General |
| Child Detection Agency | Governmental |
| College Democrats of America | Governmental |
| Christian Democratic Appeal | Governmental |
| Council for Disability Awareness | Governmental |
| Capital Development Authority | Governmental |
| Confidential Disclosure Agreement | Governmental |
| City Demonstration Agency | Governmental |
| Controller Of Defence Accounts | Indian Ministry of Defence Organization |
| CHUDA | Indian Railway Station |
| Consejos Departamentales de Alcaldes | International |
| Compagnie Des Alpes | International |
| Christen-Democratisch Appèl. | International |
| Communications Decency Act | Internet |
| Certified Dental Assistant | Jobs |
| Communicative Disorders Assistant | Jobs |
| California Dental Association | Medical |
| Colorado Dental Association | Medical |
| Commonwealth Dental Association | Medical |
| Camden Disability Action | Medical |
| Caldicott (Guardian) Delegated Authority | Medical |
| cellulose diacetate | Medical |
| chenodeoxycholic acid | Medical |
| chlorodeoxyadenosine | Medical |
| Ciliary Dyskinesia Activity | Medical |
| Complement-Dependent Antibody | Medical |
| Computer Diagnostic Assistant | Medical |
| Congenital Dyserythropoietic Anaemia | Medical |
| cytidine deaminase | Medical |
| Cute Dad Alert | Messaging |
| Catalog Data Activity | Military and Defence |
| Cognitive Decision Aiding | Military and Defence |
| Corporate Dental Application | Military and Defence |
| Cluster Development Agent | Networking |
| Chilika Development Authority | Odisha Government |
| Content Delivery Application | Softwares |
| Command and Data Acquisition | Space Science |
| Critical Design Audit | Space Science |
| Communications Decency Act of 1996 | Telecommunication |
