Smart meter and hammer: what they have in common

1. Step 1. Smart meter — has part — Microcontroller. A microcontroller does the metering.
2. Step 2. Microcontroller — is used in — Bread machine. Programs.
3. Step 3. Bread machine — is used in — Bread. Baking at home.
4. Step 4. Bread — uses — Quern. Flour was ground on millstones.
5. Step 5. Quern — is a kind of — Stone tool. A quern is two stones: the upper one is turned on the lower to grind grain.
6. Step 6. Stone tool — evolved into — Hammer. The first hammer was a stone in the hand.

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