A German radio-navigational system
Elektra Natchios, usually known only by her first name Elektra, is a fictional supervillain and anti-hero from Marvel Comics. Created by Frank Miller, she first appeared in Daredevil #168 (January 1981).
Elektra is a one-act opera by Richard Strauss, to a German-language libretto by Hugo von Hofmannsthal adapted from his drama of 1903—the first of many such collaborations between composer and librettist. It was first performed at the Dresden State Opera on January 25, 1909, and remains a part of the standard operatic repertoire.