Pounds force of pressure per square inch absolute (including atmospheric pressure). ... (05 Dec 1998) ... Found on http://www.encyclo.co.uk/local/20973
Professional Ski Instructors of America, the main organization that certifies and represents skiing instructors. Connected to AASI, the American Association of Snowboard Instructors. Found on https://snowslang.com/glossary/
Pounds per Square Inch, Absolute. A measure of gas pressure against a perfect vacuum so it includes the atmospheric pressure of 14.7 psi at sea level. Found on https://www.encyclo.co.uk/local/21522