What does pmk stand for?

Pitch Mark (AD)

Postmark (AD)

Palair Macedonian - Yugoslavia - ICAO designator (FAAC)

Panel Marking Kit

Pelton Marsh Kinsella - Commercial firm

Pitch Mark - Shipfitting (AAG)

Pointe Molloy - Kerguelen Islands - Seismograph station code, US Geological Survey (SEIS)

Portable Molding Kit

Postmark

Primark Corp. - NYSE symbol (SPSG)

Primary Monkey Kidney - Physiology

Primary Rhesus Monkey Kidney (AAMN)