PSA was an airline that used to fly passenger services inside California and to other nearby Western United States areas during the 1970s and early 1980s. Pacific Southwest Airlines' trademark was a smile drawn under their planes' cockpits.
This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. If an article link referred you here, you might want to go back and fix it to point directly to the intended page.
