1) Packet mode data 
[software] PMD is a static rule-set based Java source code analyzer that identifies potential problems like: While PMD does not officially stand for anything, it has several unofficial names, the most appropriate probably being Programming Mistake Detector. Typically, PMD errors are not true errors, but rather inefficient code, i.e. the app...
Pok
Protein Mutant Database
Packet Mode Data
Physical Media Independent as defined by ANSI X3T9.5 document.
PMD: Pelizaeus-Merzbacher disease.
The PMD series is a Soviet mine. The mine is a wooden box has a hinged lid, overlapping the sides with a deep groove cut in it above the fuse assembly, and the lid rests on the strike retaining pin. Some have a safety rod locking the lid. Pressure on the lid forces the winged retaining nut from the striker and fires the mine.
Projected Map Display
Pump Mounted Driver
Page Mid-level Directory, note that pmds are folded into pgds on systems with 2 level page tables.