A3 (suomeksi)

Määritelmät:

A standard paper size, defined by ISO 216.
(lb, en, countable, management) A one-page document, often tabular or graphical, on such paper.
(lb, en, UK, rail transport) w:LNER Gresley Classes A1 and A3, A3 class, a class of steam locomotive used on the London and North Eastern Railway.