Database and stone tool: what they have in common

1. Step 1. Database — evolved from — Hollerith tabulator. Processing large datasets began with tabulators.
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 — Fire lance. The barrel of a fire lance is a paper or bamboo tube.
5. Step 5. Fire lance — evolved from — Spear. The fire lance was a spear with a tube of gunpowder — the first step to firearms.
6. Step 6. Spear — has part — Stone tool. Early spearheads were made of stone.

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