Here is a "stamp identifier" website with thousands of entries in alphabetical order, will save you much frustration:
http://www.stamptrader.us/stamp_identifier.htmHere is a tiny sample out of the A's:
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ALCANCE Y.U.H.: Uruguay, late fee stamps.
ALEXANDRIE: France- Offices in Egypt- Alexandria.
ALFABETIZACION (overprint): Ecuador, adult education propoganda.
ALLEMAGNE DUITSCHLAND (overprint): Germany- Belgian occupation (1919-21).
ALLIED MILITARY POSTAGE: Germany- Allied military government (1945-6).
A.M. (overprint): Greece [Axia Metalliki (value in coin)].
AMBULANTE LAQUINTINIE (overprint): Camerouns, semipostal.
A.M.G.-F.T.T. (overprint on stamps of Italy): Trieste (1947-54).
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