Pa - Science and Technology

Science and Technology

• PA-RISC, an instruction set architecture developed by Hewlett-Packard
• PA series, a group of paper sizes
• Pascal (unit), an SI derived unit of pressure
• Peano axioms in mathematical logic
• Physician assistant, the title of one group of mid-level medical practitioners
• Polyacetylene
• Polyamide, the type of polymer that makes of proteins, wool, silk, and nylons
• Power amplifier, a system used to amplify speech or music so that they may be heard by large crowds of people, especially outdoors
• Proanthocyanidins
• Protactinium, a chemical element
• Production assistant, a job title in filmmaking and television
• The position angle of a binary star system
• PA pressure, or pulmonary artery pressure