Electromechanical dial counters and zip: what they have in common

1. Step 1. Electromechanical dial counters — is part of — Hollerith tabulator. Dials that count the pulses.
2. Step 2. Hollerith tabulator — uses — Punched card. The 1890 census data was encoded on punched cards.
3. Step 3. Punched card — is made of — Paper. Punched cards are stiff card.
4. Step 4. Paper — is material for — Paper money. Paper.
5. Step 5. Paper money — is used in — Wallet. It holds money.
6. Step 6. Wallet — has part — Zip. A zipped coin compartment.

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