Dear PF Forum, I just saw interesting windows at the bottom right corner of PF website. Total 964(members: 39, guest:837, robots: 88) That's a every interesting statistic. So when we post something and don't get answer immediately we'll know that at that moment PF Forum is a rather quiet, just a few members are online. What are members? People who sign in? What are quest? People who visit PF Forum but don't log in or sign up Robots? What are they? And another window Discussions: 583,909 Messages: 4,692,472 What is the difference between discussion and messages? Is discussions = thread? Is messages = post/reply to the thread? Thanks.