sign (Apud Michaëlem de Roigny, in via Iacobæa, sub signo Quatuor Elementorum = At the shop of Michel de Roigny, Rue St. Jacques, under the sign of the Four Elements)

Signum is a release by German industrial music artist P.A.L. It was his first full-length CD to be released on Ant-Zen.

Signum is the name for two European producers, Pascal Minnaard and Ronald Hagen. They are producers who create and remix mainly Trance Music. They both live in Zoetermeer, a city in the Netherlands.

Kaori Shimizu, is a character in Magical Girl Lyrical Nanoha A's. She appears in neither the previous series Magical Girl Lyrical Nanoha nor the alternate universe story Triangle Heart, but is slated to appear in Magical Girl Lyrical Nanoha StrikerS. Signum is the leader of the Wolkenritter, a creation of the Book of Darkness.

a written device occurring in various forms (e.g. a monogram, a rueda) used for the authentication of documents.

a military standard.