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

1. Step 1. Hoverboard — has part — Hub motor. Hub motors.
2. Step 2. Hub motor — is part of — Mars rover. Hub motors.
3. Step 3. Mars rover — has part — Industrial robot. A robotic arm.
4. Step 4. Industrial robot — uses — Program control of a machine. The movements are recorded in a program.
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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