C20

• Allison Model 250
• Bill C-20
• C20 (engineering)
• C20 Cities
• Caldwell 20
• Carbon-20
• Colt Canada C20 DMR
• Fokker F-32
• Gulfstream III
• Gulfstream IV
• IEC 60320 C20
• King's Pawn Game
• OMX Copenhagen 20
• SL C20
• Sauber C20
• The Twentieth Century Society