Some years ago, I have written a shareware called computer glossary. But I have decided to make this glossary available online (and other databases or lexicals soon as time permit me).
Java is required in order to browse the databases.

available databases   

english acronyms (almost 10 000 entries)
domain names (eg: .fr = France or explanation of .com)

If you want to contribute with your data or if you find any inconsistency, please send me an email