Colossus and needle: what they have in common

1. Step 1. Colossus — has part — Vacuum tube. About 2,500 vacuum tubes.
2. Step 2. Vacuum tube — is part of — X-ray machine. An X-ray tube.
3. Step 3. X-ray machine — uses — Photographic film. An image on film.
4. Step 4. Photographic film — is used in — Cinématographe. Perforated film.
5. Step 5. Cinématographe — was inspired by — Sewing machine. Louis Lumière said he came up with the intermittent film feed while watching the fabric feed of a sewing machine.
6. Step 6. Sewing machine — has part — Needle. A needle with the eye near its point.

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