1 - Postal
China Post: PR China (Beijing; Guangzhou)
Canada Post: Canada (Toronto, Ontario; Quebec, Montreal)
ELTA Hellenic Post: Greece (Athens)
Japan Post
La Poste: France (Créteil, Lognes, Paris Sud, Ain-Rhône)
Poste Italiane: Italy (Turnkey sorting systems provided since 1964 all over Italy)
Poczta Polska: Poland (Warsaw, Poznan)
Posten Sverige: Sweden (Stockholm, Malmö, Gothenburg, Tomteboda)
TNT Post: Netherlands (Arnhem)
USPS: USA (Memphis, TN; Anchorage, AK; Springfield, MA; Oakland, CA; Los Angeles, CA; San Francisco, CA)
Below are some more detailed references:
Canada Post - Toronto
Japan Post Shin-Tokyo Terminal
La Poste - Lognes (Paris), France
US Postal - APPS program
US Postal - TABS