Sorry, Brian, that's "power steering", straight out of old-school printed classifieds, as I remember them. I remember ads like " Ford F-250 3/4t PU with AT, PS, PB, PW..." Every letter saved was money saved, so those classifieds could become pretty cryptic. The one above would be advertising a pickup with automatic transmission, power steering, power brakes, and power windows, for example.
Right now, I feel older than ever.