Flat linerboard and hollerith tabulator: what they have in common

1. Step 1. Flat linerboard — is part of — Cardboard box. Liners on both sides of the fluting.
2. Step 2. Cardboard box — is made of — Wood pulp. Corrugated board.
3. Step 3. Wood pulp — is used in — Paper machine. The raw material.
4. Step 4. Paper machine — is used in — Paper. Industrial production.
5. Step 5. Paper — is material for — Punched card. Punched cards are stiff card.
6. Step 6. Punched card — is used in — Hollerith tabulator. The 1890 census data was encoded on punched cards.

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