DBM or dbm may refer to: Science and technology dBm, a unit for power measurement DBM (computing), family of key-value database engines including dbm, ndbm, gdbm, and Berkeley DB Database Manager (DBM), a component of 1987's Extended Edition v1.0 release of IBM's OS/2 operating system Dibenzoylmethane, an aromatic diketone: 1,3-diphenylpropane-1,3-dione Dibromomethane, a halomethane Difference bound matrix, a data structure used in a field of computer science Dibutyl maleate, an organic chemical compound Other uses D. B. M. Patnaik (1925–2009), Indian lawyer, politician and communist leader De Bellis Multitudinis, a wargame ruleset Department of Budget and Management, the executive department in the Philippines D-flat minor, a theoretical musical key