David Kindersley's great rule for spacing: place each letter such that its center is halfway between the centers of the adjacent letters, where center is defined in a least squares sense.

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Luc Devroye ⦿ School of Computer Science ⦿ McGill University Montreal, Canada H3A 2K6 ⦿ lucdevroye@gmail.com ⦿ http://luc.devroye.org ⦿ http://luc.devroye.org/fonts.html