Radio Station Formats (including AAA, AC, HAC, CHR, etc.): Helpful wiki link. Here’s another link to an explanation of different radio formats.

Yep. The first C stands for Christian.

Yes, I believe it is “Christian Adult Comtemporary.”

CAC ‘“ not sure, but it is christian music

Yep. The first C stands for Christian.

HAC = Hot Adult Contemporary

AC = Adult Contemporary

CAC – not sure, but it is christian music

UAC – urban adult contemporary

Basically anything with “adult contemporary” in the title is meant to appeal to adults as opposed to the teen and young 20s audience targeted by CHR (Contemporary Hits Radio i.e. Top 40 i.e. Pop) stations. If it has AC in the title it plays recurrent (read: old) songs along with whatever would appeal to adults in the regular version of that format.

So UAC takes songs “grown ups would like” from Urban radio and mixes them with older R&B and soul songs. HAC mixes CHR stuff that is less raunchy and/or “hard” and mixes it with soft rock and older pop hits. You get the idea.

AC just plays nothing but old songs. Even the newest AC songs are generally at least 6 months old on other charts.