Purple 1969 Flashback

Jamie Dinkelacker and I had a very stimulating conversation about all things collaboration and Doug Engelbart last night. Something he said about the IETF reminded me of something. If you check out IETF RFC 2 (circa 1969), you’ll notice alphanumeric references in front of each paragraph. Those are equivalent to what we call hierarchical identifiers in Purple Numbers.    (4DE)

This is no coincidence, of course. Hierarchical identifiers are stolen from Doug Engelbart‘s Augment system, where they were called structural location numbers. As for RFC 2, it was written using Augment by Bill Duvall at SRI.    (4DF)

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