DDB
DDB stands as an abbreviation for:
- DDB Worldwide , an American advertising agency
- DDB (Germany) , German branch of the DDB Worldwide group
- German Digital Library , a cross-cultural virtual library
- Deutscher Diabetiker Bund , a self-help organization
- The German Library (until 2006), today the German National Library (DNB)
- Dortmund database , a collection of thermophysical and thermodynamic data
