AcronymFinder

Or you add this to your search.ini file:

[Search Engine X]

Name=Acronym&Finder

URL=http://www.acronymfinder.com/af-query.asp?acronym=%s

Query=

Key=acro

Is post=0

Has endseparator=0

Encoding=utf-8

Search Type=1

Verbtext=17063

Position=-1

Nameid=0

This site could also be very usefull as a panel (using small screen view):

http://tlt.its.psu.edu/suggestions/international/accents/codealt.html

It contains an overview of various Windows alt key numeric codes.

(Indeed it would be for those Windows users out there -thanks! - TjL)