DB, dB, or db may refer to:
DB Cargo UK, formerly DB Schenker Rail UK and English, Welsh & Scottish Railway, is a British rail freight company headquartered in Doncaster, England.
dBase (also stylized dBASE) was one of the first database management systems for microcomputers, and the most successful in its day.
DBS Bank Ltd is a multinational banking and financial services corporation headquartered in Marina Bay, Singapore.
db4o (database for objects) was an embeddable open source object database for Java and .NET developers.
DBpedia (from "DB" for "database") is a project aiming to extract structured content from the information created in the Wikipedia project.