C4 was a New Zealand television channel owned and operated by MediaWorks New Zealand.
The Douglas DC-2 is a 14-seat, twin-engined airliner that was produced by the American company Douglas Aircraft Corporation starting in 1934.
The Encyclopedia of Chess Openings is a classification system for the opening moves in chess.
The Ikarus C42 is a two-seat, fixed tricycle gear, general aviation microlight aircraft, manufactured in Germany by Comco Ikarus.
NGC 7006 (also known as Caldwell 42) is a globular cluster in the constellation Delphinus.
Petrov's Defence or the Petrov Defence (also called Petroff's Defence, Russian Defence, and Russian Game) is a chess opening characterised by the following moves: Though this symmetrical response has a long history, it was first popularised by Alexander Petrov, a Russian chess player of the mid-19th century.