Pacific American Steamship Association - Later, AIMS
Para-Aminosalicylic Acid - Organic chemistry
Participating Agency Service Agreement (GNE)
PCR - Polymerase Chain Reaction Amplification of Specific Alleles - Genetics
Pennsylvania Association of School and Administrators (SAUS)
Personnel Administrative Services Agency - Army
Pioneers' Association of South Australia
Pipelines Authority of South Australia
Playgroup Association of South Australia
Police Association of South Australia
Polymerase Chain Reaction Amplification of specific alleles (SAUS)
Primary Acquired Sideroblastic Anemia - Medicine
Proximal Articular Set Angle - Orthopedics (DAVI)
Quepass.com, Inc. - NASDAQ symbol