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FAQ help hint bookmark view gpd4
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A bookmark view in Diigo: http://www.diigo.com/item/bookmark/grahamperrin/http%3A%2F%2Fforum.immunet.com%2Findex.php%3F%2Ftopic%2F106-the-layered-security-approach
A bookmark view in Memonic: http://mem.to/t/1cWPH