Where else have we heard the words 'First' and 'Interface' before...
http://www.highbeam.com/doc/1G1-79796963.html
It is IMVHO that MicroOS has this intricate ability to create such robust applications, which at the time voicenav was phenomenal for a portable device to be able to VR 100k speach phonetics without needing learning passes.
This and eVU with 20+ hours battery ability shows just what a duo cache flash with a very very minimum need for any ram can do.
emit...