Point-contact transistor and router: what they have in common

1. Step 1. Point-contact transistor — is a kind of — Transistor. The first transistor.
2. Step 2. Transistor — is part of — Graphics processing unit. Billions of transistors.
3. Step 3. Graphics processing unit — is part of — System on a chip (SoC). A graphics core.
4. Step 4. System on a chip (SoC) — is part of — Router. A packet-processing processor.

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