What does Py stand for?

Paraguay (MILB)

Phosphopyridoxal - Medicine (DMAA)

Polyoma Virus - Medicine (DMAA)

Pyrene - Organic chemistry (AAMN)

Pyridine - Organic chemistry

Pyridoxa - Medicine (EDAA)

Pyrimidine (DOG)

Pyrogen - Medicine

Paraguay - IYRU nationality code - MARC country of publication code - Library of Congress (LCCP)

Program Year (NAKS)

Martin Memorial - York City and County Library, York, PA - Library symbol - Library of Congress (LCLS)

Pack Year - Cigarettes (MEDA)

Pack Years - of cigarette consumption (DAVI)

Paraguay - ANSI two-letter standard code (CNC)

Patrol Vessel, Yacht - Navy symbol

Patrol Yacht (SAUS)

Peak Years - Medicine (EDAA)

Pechiney ADS - NYSE symbol

Pechiney SA - NYSE symbol

Pembroke Yeomanry - British military (DMA)

Person Years - After radiation exposure

Photography - Treasury Board of Canada Secretariat (FOTI)

Physical Year

Polygon

Polysar Ltd. - Toronto Stock Exchange symbol - Vancouver Stock Exchange symbol

Ponzer-Youngquist - Commercial firm

Preferred Health Care Ltd. - AMEX symbol (COMM)

Prior Year (AABC)

Prior Year in SYDP - Six-Year Defense Plan - Military technology (DDF)

Project Yedid - Defunct (EA)

Proto Yiddish (BJA)

Publication Year - Online database field identifier

Pyrometer (IEEE)

Pyronin Y - A biological dye

Pyrrolidine (SAUS)

Pythium - A fungus

Spray - ICAO (FAAC)

Surinam Airways - ICAO designator (AD)