Science

• Carbonate Compensation Depth, a property of oceans
• Colony Collapse Disorder, a phenomenon involving the abrupt disappearance of the worker bees in a beehive or Western honey bee colony
• Conceptual Common Denominator, the set of attributes common to the existents subsumed by a concept in the Objectivist theory of concept-formation

Technology

• Charge-coupled device, an electronic light sensor used in digital cameras
• .ccd, the file extension for CloneCD's CD image file
• Compact Compact Disc, also known as MiniCD
• Cyclic-Coordinate Descent Method, an inverse kinematics algorithm in computer graphics
• Closed Caption Display, a technology for displaying text information embedded in video signals
• Certified Community Developer
• Central composite design, an experimental design in response surface methodology for building a second order model for a response variable without a complete three level factorial
• Closed cycle diesel engines, propulsion used on diesel submarines
• Concatenated Disk, is a pseudo volume which concatenate several physical disks.
• Computacenter Distribution, the distribution arm of Computacenter PLC.

Medical

• Cleidocranial dysostosis, a genetic abnormality in humans
• Central Core Disease, a rare neuromuscular disorder
• Continuity of Care Document , an XML standard for medical information summarization
• Cortical collecting duct in the collecting duct system of the kidney

Education

• Confraternity of Christian Doctrine, religious education programs of the Catholic church normally designed for children, originated in Italy
• Community College of Denver, a community college with six campuses around Denver, USA
• Cincinnati Country Day School, a non-parochial, private school in Indian Hill, USA

Parties

• Christian Democratic Centre, a late Italian political party

NGOs

• Christian Care Foundation for Children with Disabilities, an NGO in Thailand
• Council for a Community of Democracies, an NGO in the USA
• Canadian Coalition for Democracies, a non-governmental advocacy organisation in Canada

Other

• Cafe Coffee Day, a chain of coffee shops in India
• Census County Division, a term used by the United States Census Bureau
• Camouflage, concealment and deception. A military term
• Cooperative Cyber Defence, a military term used by NATO
• Construction Change Directive, a term used in the construction industry when changes to the Contract Documents are made during construction.