Initialism of north-northwest.

Initialism of north-northwest.

Initialism of north-northwest.

(US) Initialism of National Nanotechnology Initiative.

(phylogenetics) Initialism of nearest neighbour interchange.

(Internet) Initialism of Network News Transfer Protocol (a standard mechanism for transferring messages between a server and a newsreader program.)

plural of NNH

(epidemiology) Initialism of number needed to harm.

(Internet) Initialism of no need to open: indicates that a message has no content beyond what can be seen in the subject line

The second-largest city in Anambra State in southeastern Nigeria.