Initialism of Navy Tactical Missile System.

A form of histogram in which each bar represents (approximately) the same number of cases, in contrast to a typical histogram in which the bars (or categories) are all of the same width.

(Internet) Initialism of not this group (i.e. newsgroup).

Initialism of not to be confused with.

(historical) Initialism of National Transcontinental Railway.

(astronautics) Initialism of nuclear-thermal rocket.

(sexuality, psychology, slang) Initialism of netorare.

(computing) Initialism of NT LAN Manager.

(software, Windows) Initialism of New Technology File System (a proprietary file system developed for the Windows NT family of Microsoft Windows operating systems, starting with Windows NT 3.1 and continuing to the present day).

(Internet slang, text messaging) Initialism of not that it matters.