(US, historical, 1930s) Initialism of National Recovery Act. / (UK) Initialism of National Rifle Association (of the United Kingdom). / (US) Initialism of National Rifle Association of America.

(religion) Initialism of Netherlands Reformed Congregation. / (US) Initialism of Nuclear Regulatory Commission. / (Canada) Initialism of National Research Council.

(Australia, dated) Initialism of not recommended for children. (a former film classification)

(US) Initialism of National Renewable Energy Laboratory.

(biblical) Initialism of New Revised Standard Version.

(rugby) Initialism of National Rugby League., the main rugby league competition in Australia, including one New Zealand team.

Initialism of naval research lab. / Initialism of nucleosome repeat length.

National Railway Adjustment Board.

Initialism of never removed from box.

(Internet slang) Abbreviation of not right now. / (Internet slang) Abbreviation of no reply needed.