(1) (
Network 
User 
Interface)  A user interface for a computer attached to the network.  The NUI is designed to work with remote applications and files as easily as local files.
(2) (
Notebook 
User 
Interface)  A term coined by Go Corporation for its PenPoint pen-based interface.
(3) (
Network 
User 
Identifier)  A code used to gain access into local European packet-switched networks.
(4) See 
Novell Users International.