Joystick and sickle: what they have in common

1. Step 1. Joystick — evolved into — Gamepad. A game controller.
2. Step 2. Gamepad — has part — Microcontroller. A microcontroller polls the buttons.
3. Step 3. Microcontroller — is used in — Bread machine. Programs.
4. Step 4. Bread machine — is used in — Bread. Baking at home.
5. Step 5. Bread — is made of — Grain. Bread is baked from flour ground from grain.
6. Step 6. Grain — is used in — Sickle. Cereals were reaped with a sickle.

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