Institution
- Council for a Livable World1
- Council on Competitiveness (U.S.)1
- Council on Environmental Quality (U.S.)1
- Covington & Burling1
- Crompton & Knowles Corporation1
- Cryopharm Inc.1
- Cuadra Associates1
- Cudahy Packing Company1
- Curie Foundation1
- Curtis Institute of Music1
- České vysoké učení technické v Praze1
- DAS Group, Inc.1
- DDI Corporation1
- DDI Pocket Telephone Inc.1
- DX Imaging1
- Daimler-Benz Aktiengesellschaft1
- Dartmouth/Hitchcock Medical Center1
- Davidson College1
- Davis & Rock1
- Dayton Metal Products Company 1