Contemporary Christian Music. Praise and Worship can be a bit broader, but CCM is only the modern stuff, probably the last 15 years or so.
An old school, traditional church will consider their music P&W and what they mean by it is older hymnals; mostly negro spirituals and southern poems played to old tavern songs and marching music. This would be stuff that is more recognized like Amazing Grace, Old Rugged Cross, and When The Roll Is Called Up Yonder.
CCM would not count any of the older music. Only the new age, guitar/keyboard/boom-tist-boom-tist kind of music which is generally a mix of country, hip-hop, and only a bit of borrowing FROM the old hymnals, but not enough to consider it a modern cover of the hymnal. The churches that play CCM also call their music P&W as well.
A lot of the more traditional churches do not accept the modern music. It is considered "of the deh-boh" but out of ignorance. I've met many preachers of different denominations who have said Christian Rock "as they call it" is evil because of a number of things, but none of them make sense from a musician's stand point. They will say, "It's the beat. The beat makes it evil." These people don't usually have any formal music background though and are unable to explain exactly what about the beat is evil. I've heard some really ridiculous statements on it. My "go to" statement to them is, "So, if I played Old Rugged Cross at 132 BPM, it becomes Satanic?".