You may not know this, but before I moved this blog to the Blogger service (in it’s current form), I wrote a number of articles that, after the switch, were archived. I’ve decided that it might be cool to bring back some of these and see if they are still relevant today. One such blog entry was created in the spring of 2003. Back then I was looking to understand the scenarios that PST (or called RST) was going to need to be charged on various services. Of course, with this year’s change to HST, most of this is depreciated, but still interesting. My notes are interspersed.