There's logic to changing CEL to BKL. It was too close to CLE. Similar identifiers cannot be within 200 miles of each other. David R -------------- Original message -------------- > Cause all the logical ones were taken. There is no real logic to the three > letter assignment. As an example the first 3 letter for Cleveland Burke > Lakefront was CEL (Cleveland Hopkins was CLE at the time). It was changed > at a later date to BKL. > Al > > ----- Original Message ----- > From: "Blaine Thompson" > To: > Sent: Thursday, July 15, 2004 2:56 PM > Subject: FSD > > > > Any idea why FSD (Sioux Falls, South Dakota) has that airport code? > > > > My hunch is FSD = Falls South Dakota, but my hunch has been wrong > > before... > > > > Blaine > >