(1) (
Network-to-
Network
Interface) In ATM networking, the interface between two ATM devices (typically ATM switches). In frame relay networking, the interface between two separate frame relay networks. Contrast with
UNI.
(2) (
National
Nanotechnology
Initiative) A U.S. government program designed to accelerate R&D in the nanotechnology field. It was announced in 1999 by President Clinton. The government's NNI budget request for FY 2008 was $1.5 billion. See
nanotechnology.