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

1. Step 1. Nipkow disk — uses — Persistence of vision. The lines merge into a frame thanks to persistence of vision.
2. Step 2. Persistence of vision — is used in — Zoetrope. The illusion of motion.
3. Step 3. Zoetrope — is made of — Paper. The pictures are on a paper strip.
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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