Not Camp Appropriate, 3 words generally used by counsellors at bible camp to stop doing anything anti-christ.
kid: let's go smoke some weed by the 'jesus loves you' sign.
counsellor: kids, that is NCA.
No Current Acronym:
In addition to being used as an acronym for a multitude of associations, administrations, academies, assemblies and archives; NCA can simply mean, "No Current Acronym".
The company logo, "NCA" are just letters that have no defined acronym.