The Head-Driven Phrase Structure Grammar (HPSG) is a grammar theory developed by Pollard and Sag (1985). It uses a uniform formalism and is organized in a modular way which makes it attractive for Natural language processing.
... can mean the following:
dB is the abbreviation for Decibel; see Bel
DB is a French automobile maker; see DB (car)
DB is the abbreviation for Deutsche Bahn, the ...