As noted in a previous post, the Special Libraries Associatin will be celebrating its centennial in 2009. One of the most unusual types of special libraries is the philatelic library. Philatelic libraries, which are few in number, range from small volunteer run libraries to libraries connected to some of the largest cultural institutions in the world. In 2008 three of these libraries celebrated significant anniversaries. The American Philatelic Research Library (APRL) which is affiliated with the American Philatelic Society celebrated its fortieth anniversary. The Rocky Mountain Philatelic Library (RMPL) celebrated it 15th anniversary, and the National Postal Museum Library also celebrated its 15th anniversary. I've had the opportunity to visit both the APRL and the RMPL and the the service that they provide to philatelists is impressive. Although I have visited the National Postal Museum on a couple of occasions, I did not get to see the library. I was recently presented with the opportunity which I accepted to edit a column on the activities of philatelic libraries in the Philatelic Literature Review, a publication of the APRL. I'm looking forward to learning even more about these interesting libraries.