Encode / Decode @ WorldSpan

Encode/Decode
 
City-Encode

KC/PEORIA

City-Decode

KD/PIA

Airline – Encode

KAC/AIR CANADA

Airline – Decode

KAD/AC

Country – Encode

4C* or 4C*J (first letter of country)

Country – Decode

HG*CO*

Car – Encode 

CRCALAMO

Car – Decode

CRCAL

Hotel – Encode

HCOMNI

Hotel – Decode

HCOM