Thanks Nick
I was wondering what this format was and I have followed this formum for most of those 13 years. I do like the way threads work and the searches among other things. I have no idea what Perl or PHP are but this works so that doesn't matter.
Appreciate you and the others taking the time to answer me.
best
don
: The system that runs this form TetraBBS: http://tetrabb.com/ has a
: lot to recommend it. It is free and reliable.

: I like its ability to support free, wide-ranging discussion. Most
: forum systems work under a Head-of-the-thread index system. In
: other words the index of threads links to the first post in a
: thread and that link indicates the subject of the first message.
: In many discussions the child messages will veer off the
: original topic. For a reader coming to the index there is no way
: of knowing what is actually being discussed within the thread
: without opening up the the whole thread.

: With this system it is easy to change the subject header as I have
: done on this message and readers can have an idea of where the
: subject discussion is going.

: I also like the way this system marks new messages. I've found with
: some systems that it can be very hard to look at a thread of
: discussion and see where the new messages that I have not yet
: read.

: This system uses rather old technology as far as web tech goes. It
: is written in Perl instead of PHP, but as such it is very stable
: and has proven reliable in the 13 years I have been running
: various versions of the script.