MB?

What do you mean not chronological order?

The top post on the board is the most recently posted one. Each reply is then under it in chronological order, you can easily tell who is replying to who. Many forums do not even have that feature, you can only reply to the orignal post not the people who replyed. For example here I am replying to you (gaakz) not the person who wrote the original post in the thread (Ascalon).