Silica (sand) and smart meter: what they have in common

1. Step 1. Silica (sand) — is material for — EPROM. The UV-erase window is quartz glass.
2. Step 2. EPROM — evolved into — Flash memory. Electrically erasable EPROM.
3. Step 3. Flash memory — is part of — Microcontroller. Program memory.
4. Step 4. Microcontroller — is part of — Smart meter. A microcontroller does the metering.

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