Percussion cap and hollerith tabulator: what they have in common

1. Step 1. Percussion cap — evolved from — Flintlock. The percussion lock replaced the flintlock.
2. Step 2. Flintlock — has part — Spring. A mainspring.
3. Step 3. Spring — is part of — Automaton. The mainspring stores the energy.
4. Step 4. Automaton — inspired — Jacquard loom. Vaucanson, the maker of automata, built an automatic loom whose ideas Jacquard used.
5. Step 5. Jacquard loom — uses — Punched card. Each punched card sets one pass of the pattern.
6. Step 6. Punched card — is used in — Hollerith tabulator. The 1890 census data was encoded on punched cards.

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