Registering 2 letter second level domain

  > Arnold Nipper <nipper at xlink.net> writes:
  > Miguel A. Sanz wrote:
  > > 
  > > 
  > > Hi!
  > > 
  > > Does anyone know if there is any imperative (writen or oral)
  > > to avoid registering 2 letter second level domains? 
  > > 
  > 
  > No, there isn't. There are lot of 2 letter second level domains under almos
  > t
  > all TDL, e.g.

The problem with two letter domains in general is the ambiguity of
abbreviated domain names.  In principle you can always abbreviate domain
names by omitting common higher levels.  if you are inside a two letter
domain which also exists as a toplevel domain this is ambiguous. 

Example: If you are inside ac.uk

	foobar.co can mean
	
			foobar.co.uk		in the UK

	or

			foobar.co		in Columbia

Mostly this conflict is resolved in favour of the toplevel domain but
the ambiguity exists. 

That's why it is advisable not to use two letter domains anywhere and
also to avoid com edu mil etc. 
Since avoiding this is not hard it is advisable, in my opinion.
Why not just use three letter state codes? A possible problem
avoided at no cost.

Daniel