How many types of chairlifts are there?

There are several different kinds of chairlifts. There are ones that attach to your banister rail with a seat for you to sit on that moves up and down the stairs. There are also ones that actually allow your wheelchair to move up and down the stairs. In addition to chair lifts you'd find indoors, there are also ones to help lift wheel chairs in and out of vehicles. Ameriglide and Acron are complanies that sell chair lifts.