Calculus and gutenberg printing press: what they have in common

1. Step 1. Calculus — uses — Cartesian coordinates. The analysis of functions.
2. Step 2. Cartesian coordinates — is used in — Map. Latitude and longitude.
3. Step 3. Map — includes — Mercator projection. A projection.
4. Step 4. Mercator projection — uses — Gutenberg printing press. Maps were printed in large numbers.

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