What does Pth stand for?

Polythiophene - Organic chemistry

Hydrofoil Motor Torpedo Boat - Ship symbol (NATG)

Pacer Technology (EFIS)

Pallet Torque Hook

Panther Mines Ltd. - Vancouver Stock Exchange symbol

Paper Tape Half-Duplex

Parathormon (SAUS)

Parathormone - Medicine (MAE)

Parathyroid Hormone - Endocrinology

Pataxo-Hahaai - Language code (ETLW)

Path (GAVI)

Pathfinder - NCIC car model code

Pathology - Medical specialty (DHSM)

Peak Tanning Hours - Supposedly occurring between 10am and 2pm - See also BROTS, SROTS

Phenylthiohydantoin - Organic chemistry

Pin-Through-Hole (SAUS)

Plasma Thromboplastin Component - Medicine (DMAA)

Plated through Hole

Port Heiden - Alaska - Airport symbol (OAG)

Port Heiden, AK - Location identifier - FAA (FAAL)

Port Huron, MI - Amtrak rail station code

Post-Transfusion Hepatitis - Medicine

Prime Tanning Hours (TONE)

Processor Test Handler (SAUS)

Project Team Head (MHDI)

Project Top Hat - Defunct (EA)

Psychotherapeutische Medizin (SAUS)

Public Teaching Hospital (ODA)