Fractional distillation and smart meter: what they have in common

1. Step 1. Fractional distillation — is used in — Chemical plant. Separation.
2. Step 2. Chemical plant — has part — Programmable logic controller. Process control automation.
3. Step 3. Programmable logic controller — has part — Microprocessor. A processor.
4. Step 4. Microprocessor — evolved into — Microcontroller. A processor with peripherals on the chip.
5. Step 5. Microcontroller — is part of — Smart meter. A microcontroller does the metering.

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