Other "state" abbreviations of note, which Canadians have been forced to adopt to pacify the supposedly superior U.S. Postal System (and other unrelated shipping companies that are giving the USPS a run for its money):
British Columbia- BC
New Brunswick- NB
Northwest Territories / Nunavut- NT
Nova Scotia- NS
Prince Edward Island- PE
Yukon Territory- YT
Nonetheless, Canada maintains it's own Postal ("Zip") Codes, with a bunch of confuzing, seemingly randomly selected letters and numbers that drive U.S. companies to distraction (example: 1NR 3Q4 5D44FCASF1A5F1F5F17503S0).