Power amplifier.
Public accountant.
Public Act.
Pennsylvania, a state of the United States of America
Papua, a province of Indonesia
Pará, a state of Brazil
Palestinian Authority
Proto-Algic (sometimes abbreviated PAc to distinguish it from Proto-Algonquian)
Proto-Athapaskan
Proto-Algonquian (sometimes abbreviated PAn to distinguish it from Proto-Algic, but usually just abbreviated PA with Proto-Algic being abbreviated PAc)
That which helps; anything serving to assist.
One who helps; an aide; assistant; auxiliary.
A locomotive that assists a train, usually on steep gradients.
A person who does cleaning and cooking in a family home, or in a market; domestic employee.