Rocket core stage and hollerith tabulator: what they have in common

1. Step 1. Rocket core stage — is part of — R-7 rocket. A second stage that runs from liftoff.
2. Step 2. R-7 rocket — uses — Launch complex. Baikonur.
3. Step 3. Launch complex — uses — Rocket. Launching rockets.
4. Step 4. Rocket — is made of — Paper. The first rockets were paper tubes filled with gunpowder.
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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