

Doctor of Philosophy


Port Hueneme Division


Per Hatch Per Day


Port Huron and Detroit Railroad


Power Hybrid Doubler


Pulse Height Discriminators

Doctor of Philosophy degree

Doctor of Philosophy in Education

Duncan Aviation

IATA code for Harry Clever Field, New…

Parallel Head Disk

Parallel Hybrid Device

Personal Health Data

Phage Host Defective

Phase History Data

Philosophiae Doctor

Philosophiæ Doctor

Philosophical Doctor

Phosducin

Photoelectron Diffraction

Physical Hydrology Division

Piled Higher and Deeper

Pioneer Floating Rate Trust

plant homeo domain

plant homeo domains

Playa Hatin Degree

pleckstrin homology domain

Pocket Hard-disk

Poor Helpless Drunk

Port Huron and Detroit Railroad Compan…