MS.—Manuscriptum, manuscript (Handskrift).
MSS.—Manuscripts (Handskrifter).
Mt.—Mount, or mountain (Berg).
Mus. D.—Doctor of Music.
N.—North; Number; Noun (Nord; Nummer, antal; Nomen).
N. A.—North America (Nord Amerika).
Nah.—Nahum.
Nat. Hist.—Natural History (Naturalhistoria).
N. B.—New Brunswick (Provins i Kanada).
N. B.—Nota bene, mark well; take notice (Märk väl, gif noga akt).