Having been away from the hobby for over 40 years I have had to learn about a lot of new technologies, and quite a few operating procedures that have apparently changed. I was always a CW person, and have returned to my roots. I just came up from my radio room where I heard no less than three CQ calls followed by "AR - K." Have I lost my mind as well as my memory? That doesn't make any sense to me at all. Of course I will not answer those calls, because it appears they are already in a QSO with someone. But why then, the AR? I am guessing that there has been a change?