DCI
- 1999 Washington summit
- 601 (number)
- Criminal Investigation Department (Kenya)
- D-chiro-inositol
- DCI (Wizards of the Coast)
- DCI Cheese Company
- DCI Global Partnerships
- Dade Correctional Institution
- Data center interconnect
- Data, context and interaction
- Decompression illness
- Defence for Children International
- Dental Council of India
- Detective chief inspector
- Development Cooperation Instrument
- Dialysis Clinic, Inc
- Digital Cinema Initiatives
- Digitally controlled impedance
- Diners Club International
- Director of Central Intelligence
- Discovery Communications
- District of Columbia International School
- Dolphin Capital Investors
- Drum Corps International
- Dynamic Cassette International
- Défense Conseil International
- Kenya Police
- San Francisco Canyon Company