Can you give more detail about it? I like to know more.
What would you like to know? Please give more detail to your question.

There is an article about Booot in the
Chess Programming WIKI.
If you wish to know how to use it, you can use it with any chess GUI supporting the UCI protocol, for example with
this one, also written in Pascal.

Even XBoard (WinBoard if you are on Windows) supports the UCI protocol.