Standard kilogram and Babbage’s Analytical Engine: what they have in common

1. Step 1. Standard kilogram — uses — Metric system. The unit of mass.
2. Step 2. Metric system — uses — Hindu–Arabic numerals. Decimal multiples.
3. Step 3. Hindu–Arabic numerals — is used in — Algorithm. Al-Khwarizmi described calculations in decimal notation.
4. Step 4. Algorithm — is used in — Program control of a machine. A program is a written algorithm.
5. Step 5. Program control of a machine — is used in — Babbage’s Analytical Engine. The first concept of a general-purpose machine controlled by a program.

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