Contrary to what you might have heard, slide rules are cool, and have powerful mathematical magic embedded within. It's the magic of LOGARITHMS! (not joking)
It's not well-written, but it suggests a way to make your long-term data storage more secure by generating and storing error correction files along with your data backup dvds.
No account, nothing to sign up for. A bare minimum quick online invitation with a map and the ability to broadcast it via Twitter. Nice alternative to Evite. h/t @mriggen
