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It's the code for the airport - PDX (the "x" means it's international, and all US airports are three letter codes)
EDIT: nope, "x" doesn't mean international, I take it back:
"However, the National Weather Service did tabulate data from cities around the country using a two-letter identification system. Early airlines simply copied this system, but as airline service exploded in the 1930's, towns without weather station codes needed identification. Some bureaucrat had a brainstorm and the three-letter system was born, giving a seemingly endless 17,576 different combinations. To ease the transition, existing airports placed an X after the weather station code. The Los Angeles tag became LAX, Portland became PDX, Phoenix became PHX and so on. Incidentally at the historic sand dune in Kitty Hawk where the first flight occurred the U.S. National Parks Service maintains a tiny airstrip called FFA—First Flight Airport."
From an article by Dave English in Air Line Pilot, the journal of the Air Line Pilots Association
Last edited by PNW-type-gal; 08-08-2007 at 03:23 PM..
Reason: updated
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Why abbreviated as PDX?
What does that stand for? Thanks!
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