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Richard Nairn | 1 years ago (raw) | root | parent | reply | flag 
 @b541bfe5 @2827a0a2 
If you care talking about the full code all Canadian airports start with C CYYC. The Y prefix signifies that the airport is co-located with a weather station and the last letters were the Morse Code identifiers from the railway days for the city... 
But yes for twitter it was a short identifier for the city...  
https://en.wikipedia.org/wiki/IATA_airport_code
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Ned Yeung | 1 years ago (raw) | root | parent | reply | flag 
 @3a59cd17 @2827a0a2 

Very interesting!
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Richard Nairn | 1 years ago (raw) | root | parent | reply | flag 
 @b541bfe5 @2827a0a2 Yes. So it isn’t random but Canada went with a fundamentally different naming scheme than just trying to shorten the city name to a code. We just adopted a existing naming scheme