SDU
Sdu stands for:
- Sdu , Dutch publishing house and service company
SDU stands as an abbreviation for:
- Rio de Janeiro-Santos Dumont Airport, an airport in Rio de Janeiro, Brazil, as an IATA airport code
- Service data unit , data packets for network traffic
- Social Democratic Union , several European parties
- Social Democratic Union , a former German party
- Special Detective Unit
- Southern Danish University , a Danish university association
- Surveillance Detection Unit , an American secret service organization
- Sverigedemokratisk Ungdom , a Swedish youth organization
- Sydslesvigs danske Ungdomsforeninger, SdU, Danish youth organizations in southern Schleswig
