--- title: C21 slug: c21 qid: Q1392805 snapshot: c21-162172-d1be3bf2349073a4 content_hash: d1be3bf2349073a4c3fd370a96ea153ae4ba0f64b18e5dc4f644d0c3741ab037 license: CC BY-SA 4.0 source: https://en.wikipedia.org/w/index.php?oldid=1158778746 tags: [13343204, 23118434, 3566086, 4410601] --- # C21 > [!note] Provenance > Snapshot `c21-162172-d1be3bf2349073a4` · content root `d1be3bf2349073a4…` > Derived from · Licensed CC BY-SA 4.0 C-21, C 21, or C21 may refer to: * C21 Sako TRG M10 Sniper Weapon System, Canadian Armed Forces sniper rifle. * C21 (group), a Danish boy band ** C21 (album), 2003 * C-21 Dolphin, a flying boat used by the United States Army Air Corps * , a 1909 British C class submarine * Learjet C-21, an American military transport aircraft * Sauber C21, a 2002 racing car * Space Adventures C-21, a Russian design for a suborbital rocket plane for Space Adventures * Anal cancer (ICD-10 code: C21) * Center Game (Encyclopaedia of Chess Openings code: C21) * Caldwell 21 or NGC 4449, an irregular galaxy in the constellation Canes Venatici * Carbon-21 (C-21 or 21 C), an isotope of carbon * Catch 21, a television game show based on blackjack * C-21, C 21, or C21 may refer to: C21 Sako TRG M10 Sniper Weapon System, Canadian Armed Forces sniper rifle. C21 (group), a Danish boy band C21 (album), 2003 C-21 Dolphin, a flying boat used by the United States Army Air Corps , a 1909 British C class submarine Learjet C-21, an American military transport aircraft Sauber C21, a 2002 racing car Space Adventures C-21, a Russian design for a suborbital rocket plane for Space Adventures Anal cancer (ICD-10 code: C21) Center Game (Encyclopaedia of Chess Openings code: C21) Caldwell 21 or NGC 4449, an irregular galaxy in the constellation Canes Venatici Carbon-21 (C-21 or 21 C), an isotope of carbon Catch 21, a television game show based on blackjack ==See also== 21st century Century 21 (disambiguation) 21c (disambiguation)