Probability theory and incandescent light bulb: what they have in common

1. Step 1. Probability theory — is used in — Statistics. Probabilistic foundations.
2. Step 2. Statistics — uses — Hollerith tabulator. Processing censuses.
3. Step 3. Hollerith tabulator — uses — Electromagnetism. The counters click with electromagnets.
4. Step 4. Electromagnetism — is used in — Vibration motor. Like any electric motor, it turns thanks to electromagnetism.
5. Step 5. Vibration motor — is made of — Tungsten. The eccentric weight is tungsten.
6. Step 6. Tungsten — is material for — Incandescent light bulb. A tungsten filament (since 1904–1910).

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