n A small flap or strip of material attached to something, for holding, manipulation, identification, etc.
n (by extension) (graphical user interface) A navigational widget for switching between sets of controls or documents.
n (slang) A student of Cambridge University, derived from the Latin Cantabrigia (often shortened to Cantab.).
n (computing) A space character ((unsupported|tab)) that extends to the next aligned column, traditionally used for tabulation.
n A form of musical notation indicating fingering rather than the pitch of notes, commonly used for stringed instruments.