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I had a few classes this week where I was teaching basic data security: backup, passwords, viruses, adware etc. Inevitably we covered spam emails (and spam blog comments, come to that) and I asked each class whether they knew why these were caled "spam". Someone in ech class knew about Spam the meat product (from Hormel Foods) but none of them could explain how the name of a none-too-appetizing processed meat product came to be attached to unwanted bulk emails.
So I showed them the missing link, so to speak. Here it is.