Of or relating to Norfolk, Virginia, United States. / (less common) Of or relating to Norfolk in England.

Pertaining to or having ribs; ribbed. / Specifically, thin so as to have prominent ribs; emaciated. / (UK) Shabby, in poor condition.

Initialism of Overall Position. / (theater) Initialism of opposite prompt; stage right. / (Internet) Initialism of original poster; the person who started a thread.

(electronics, embedded systems) Initialism of Hardware-In-the-Loop.