G-canon is absolute canon; the movies (their most recent release), the scripts, the novelizations of the movies, the radio plays, and any statements by George Lucas himself. G-canon always overrides the lower levels of canon when there is a contradiction. Within G-canon, many fans follow an unofficial progression of canonicity where the movies are the highest canon, followed by the scripts, the novelizations, and then the radio plays.
C-canon is primarily comprised of elements from the Expanded Universe including books, comics, and games bearing the label of Star Wars. Games and RPG sourcebooks are a special case; the stories and general background information are themselves fully C-canon, but the other elements such as character/item statistics and gameplay are, with few exceptions, N-canon.
S-canon is "secondary" canon; the story itself is considered non-continuity, but the non-contradicting elements are still a canon part of the Star Wars universe. This includes things like the popular online roleplaying game Star Wars: Galaxies and certain elements of a few N-canon stories.
N-canon is "non-canon". What-if stories (such as stories published under the Star Wars: Infinities label), game stats, and anything else directly contradicted by higher canon ends up here. N-canon is the only level that is not considered canon by Lucasfilm.
Das Buch sprach nur von fast 12 mal so lang wie gänige SZs, was auch Vics ansprechen könnte. Star Pilot war die erste Quelle die 19000 Angab.