US States:

1. AL - Alabama
2. AK - Alaska
3. AZ - Arizona
4. AR - Arkansas
5. CA - California
6. CO - Colorado
7. CT - Connecticut
8. DE - Delaware
9. DC - District of Columbia
10. FL - Florida
11. GA - Georgia
12. HI - Hawaii
13. ID - Idaho
14. IL - Illinois
15. IN - Indiana
16. IA - Iowa
17. KS - Kansas
18. KY - Kentucky
19. LA - Louisiana
20. ME - Maine
21. MD - Maryland
22. MA - Massachusetts
23. MI - Michigan
24. MN - Minnesota
25. MS - Mississippi
26. MO - Missouri
27. MT - Montana
28. NE - Nebraska
29. NV - Nevada
30. NH - New Hampshire
31. NJ - New Jersey
32. NM - New Mexico
33. NY - New York
34. NC - North Carolina
35. ND - North Dakota
36. OH - Ohio
37. OK - Oklahoma
38. OR - Oregon 
39. PA - Pennsylvania
40. RI - Rhode Island
41. SC - South Carolina
42. SD - South Dakota
43. TN - Tennessee
44. TX - Texas
45. UT - Utah
46. VT - Vermont
47. VA - Virginia
48. WA - Washington
49. WV - West Virginia
50. WI - Wisconsin
51. WY - Wyoming

American Territories:

1. AS - American Samoa
2. FM - Federated States of Micronesia
3. GU - Guam
4. MH - Marshall Islands
5. MP - Commonwealth of the Northern Mariana Islands
6. PR - Puerto Rico
7. PW - Palau
8. UM - U.S. Minor Outlying Islands
9. VI - U.S. Virgin Islands

Canadian Provinces:

1. AB - Alberta
2. BC - British Columbia
3. NL - Labrador
4. MB - Manitoba
5. NB - New Brunswick
6. NL - Newfoundland
7. NT - Northwest Territories
8. NS - Nova Scotia
9. NU - Nunavut
10. ON - Ontario
11. PE - Prince Edward Isl.
12. QC - Quebec
13. SK - Saskatchewan
14. YT - Yukon