A an orchid judge, we get lists or abbreviations, but the list is something like 25 pages long and contains hundreds (something like 500+) of abbreviations. I did find 2 lists on the web which hopefully will contain what you're looking for:
http://www.notsogreenthumb.org/orchi...ra/genera1.htm http://www.orchids.mu/Glossary/Glossary_A.htm