Disposable nappy and Babbage’s Analytical Engine: what they have in common

1. Step 1. Disposable nappy — is made of — Polyethylene. Film.
2. Step 2. Polyethylene — is material for — Tetra Pak. Polyethylene.
3. Step 3. Tetra Pak — is made of — Paper. Cardboard.
4. Step 4. Paper — is material for — Punched card. Punched cards are stiff card.
5. Step 5. Punched card — is used in — Babbage’s Analytical Engine. Operations and numbers were entered on punched cards.

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