Computer Oriented Stamps

My dad is an avid stamp collector or philatelist.  He has tended to focus on specific countries like Brazil, Norway, Ecuador, Portugal, etc.  Every time I visit him I learn a bit more about stamp collecting.  One area that I find interesting is slicing the collection along more topical lines like World's Fairs, Flowers, Airplanes, etc. 

I was intrigued to see Wired Magazine's online posting about Computers in Stamps and the fascinating display of stamps from around the world giving a history of computers in pictorial fashion.