Other
- PDM-A, modernized version of the RPO-A reactive flamethrower
- PDM (cycling team), the cycling team sponsored by Philips Dupont Magnetics
- Philips Dupont Magnetics, a joint venture between Philips and DuPont
- Polarization-division multiplexing
- Precedence Diagram Method, a project scheduling technique
- Predictive maintenance, a method for planning equipment maintenance based on their condition
- Product data management
- Programmed depot maintenance, scheduled maintenance performed at a repair depot
- Project: Deadman, a hip hop duo consisting of Prozak and Mike E. Clark
- Psychodynamic Diagnostic Manual, a psychoanalytically-oriented manual for use by mental health professionals
- Prague Daily Monitor, a newspaper published in the Czech Republic
- Public Domain Mark, a way of distinguishing works that are free of known copyright
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