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

1. Step 1. Aircraft — includes — Hot air balloon. A balloon.
2. Step 2. Hot air balloon — is made of — Paper. It was lined with paper on the inside.
3. Step 3. Paper — is material for — Punched card. Punched cards are stiff card.
4. Step 4. Punched card — is used in — Babbage’s Analytical Engine. Operations and numbers were entered on punched cards.

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