Origin of Airport Codes

[crookesa]

Does anyone know where the names for Shannon (EINN) and Dublin (EIDW) originated from?

I know the EI is Ireland and the other 2 established at national level.
Does anyone know where the NN and DW came from?

[crookesa]

Found out that Shannon is named after the townsland that it's located in is Rineanna. Now to unscramble the Dublin (DW) puzzle!!!

[Talkdownman]

And the origin of Gatwick and Luton, egGW........:ugh:

[Windy Militant]

Search is your friend, http://www.pprune.org/forums/showthread.php?t=37219
This explains the "logic" behind the codes.