I am independently studying Spanish. And I understand that EE.UU. indicates Estados Unidos(Unites States). But what does each individual letter stand for in EE.UU.?
There were 2 responses to this question:
1.
I am not a Spanish speaker, but I am an Italian speaker and many acronyms in foreign languages do not translate literally with a word for each letter. EEUU is used as Estates Unidos is plural (as opposed to saying United State singular).
Unfortunately, I could not find any authoritative sites, though naturally there may be many such sites in Spanish language.
http://es.wikipedia.org/wiki/EEUU
http://www.processwrite.com/bloghost/100degrees/archives/cat_tech_tedia_blog.html (blog author mentions trying to find out this same information, and confirms that the letters are doubled to indicate plural).
2.
Apparently the doubled letter indicates a plural, as when in English indexes we use "p. 17" but "pp. 17-24". This according to "About.com":
http://spanish.about.com/library/questions/blq-eeuu.htm
Not always the best source, but see also:
http://forum.wordreference.com/showthread.php?t=112
http://en.wikipedia.org/wiki/Acronym
http://www.donquijote.org/spanishlanguage/words/letra.asp?letra=e