CDA, Cda, or CdA may refer to:

In educationEdit

In law and governmentEdit

Government agenciesEdit

LawsEdit

Other uses in law and governmentEdit

OrganizationsEdit

Political parties and lobbying groupsEdit

Other organizationsEdit

In science and technologyEdit

In chemistryEdit

In computingEdit

In health and medicineEdit

In spaceflightEdit

In mathematicsEdit

Other uses on science and technologyEdit

Other usesEdit