PDB or pdb may refer to:
Organizations Party of German-speaking Belgians (German: ), a former Belgian political party Promised Day Brigade, a former Iraqi organization
Science and technology Protein Data Bank, a biological molecule database Protein Data Bank (file format) Potato dextrose broth, a microbiological growth medium Pee Dee Belemnite, a reference standard for isotopes; see δ13C
Computing PDB (Palm OS), a record database format Pluggable database, in Oracle Database Program database, a debugging information format Python Debugger (pdb), of the Python programming language; see Stepping
Other uses Chess Problem Database Server (PDB Server), a repository for chess problems Pousette-Dart Band, an American band President's Daily Brief, a US intelligence document
See also 1,4-Dichlorobenzene or para-dichlorobenzene (PDCB), a chemical Bangladesh Power Development Board (BPDB)