Mercator projection et Machine CNC : ce qu'ils ont en commun

1. Étape 1. Mercator projection — utilise — Gutenberg printing press. Maps were printed in large numbers.
2. Étape 2. Gutenberg printing press — fonctionne comme — Jacquard loom. An analogy, not proven influence: both set type and a chain of punched cards are a replaceable pattern that a machine reproduces over and over.
3. Étape 3. Jacquard loom — utilise — Program control of a machine. The chain of cards is the program of the pattern.
4. Étape 4. Program control of a machine — est utilisé dans — Machine CNC. The tool’s movement is set by a program — at first on punched tape.

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