Close quarters combat (CQC) or close quarters battle (CQB) is a type of fighting in which small units engage the enemy with personal weapons at very short range, potentially to the point of hand-to-hand combat or fighting with hand weapons such as swords or knives. Found on http://en.wikipedia.org/wiki/Glossary_of_firearms_terms
Close Quarter Battle, the kind of combat that is a hallmark of police special ops, where engagements are at extremely short range and happen at extremely high speed
Found on http://www.encyclo.co.uk/local/20524