Transatlantic cable and fitness tracker: what they have in common

1. Step 1. Transatlantic cable — has part — Copper wire. A copper core.
2. Step 2. Copper wire — is part of — Printed circuit board. Copper traces.
3. Step 3. Printed circuit board — is part of — Touchpad. The sensor grid is on a circuit board.
4. Step 4. Touchpad — works like — Touch layer (capacitive). The same capacitive sensing without a screen.
5. Step 5. Touch layer (capacitive) — is part of — Smartwatch. A touchscreen.
6. Step 6. Smartwatch — evolved from — Fitness tracker. Tracker functions moved into watches.

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