Welcome Dean! A good place to start to learn about our Parker guns is the
www.parkerguns.org web page. On that page, there is a list on the left side of the page which are actually links to other web pages related to Parker Bros.
I would recommend that you read the links listed under the heading "Collector Information". Those will help get you up and running on the basic understanding of the terms used on this forum.
Welcome and above all, ask anything and I am sure there will be someone here that will give you accurate, helpful information.