PET and smart meter: 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 — Microcontroller. A memory controller.
4. Step 4. Microcontroller — is part of — Smart meter. A microcontroller does the metering.

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