Plastic bottle body and personal computer: what they have in common

1. Step 1. Plastic bottle body — is part of — Plastic bottle. An inflatable body.
2. Step 2. Plastic bottle — is made of — PET. A PET bottle.
3. Step 3. PET — is material for — Floppy disk. The disk is Mylar (PET) with a magnetic coating.
4. Step 4. Floppy disk — uses — Magnetism. Magnetic recording.
5. Step 5. Magnetism — is used in — Hard disk drive. Magnetic recording.
6. Step 6. Hard disk drive — is part of — Personal computer. A hard disk.

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