There are many informative and engaging online resources on the differences between BrE and AmE. In addition to the Oxford Dictionary's introductory list of differences in BrE and AmE terminology, interested readers might wish to read the Wikipedia entries Comparison of American and British English and American and British English spelling differences.

Also of interest are blogs such as Not One-Off Britishisms, on the seepage of traditional Britishisms into AmE, or Separated by a Common Language, on differences between BrE and AmE terminology.