Usenet was around quite a while before WebTV was available.  This particular
usenet group was created in August 1997.  When you click on Groups using
Webtv it probably automatically sends you to Usenet groups.  Usenet has
about 70 thousand different groups of various types. Not sure if WebTV also
sends you to MSN groups which would probably add another 70 thousand
different available groups. Yahoo probably has 50 thousand or more different
available groups and more recently Google sponsors umpteen thousand more.
You get the idea - there are lots of groups out there. WebTV does not have
anything directly to do with this group except for pointing you towards it.

Welcome to the usenet Alzheimer group,   AW

one thing you need to do is to use the reply function, rather
than to start new threads.  usenet threads all the replies
together into a thread, and if you post a new message instead of
replying, even if the subject is the same, they are no longer
connected.

Linda,  Web TV can access usenet groups, and so can a computer, which is
what many of us post from.   It doesn't much matter, but it is still usenet.
Welcome to the group!