PET and turbojet engine: what they have in common

1. Step 1. PET — is material for — Floppy disk. The disk is Mylar (PET) with a magnetic coating.
2. Step 2. Floppy disk — evolved into — USB flash drive. It replaced floppy disks.
3. Step 3. USB flash drive — has part — Flash memory. Flash memory.
4. Step 4. Flash memory — is part of — Flight recorder. Memory.
5. Step 5. Flight recorder — is part of — Jet airliner. Flight recorders.
6. Step 6. Jet airliner — has part — Turbojet engine. Jet engines.

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