Canal lock and monitor: what they have in common

1. Step 1. Canal lock — is part of — Panama Canal. Locks.
2. Step 2. Panama Canal — has part — Electric locomotive. Electric “mules” tow the ships through the locks.
3. Step 3. Electric locomotive — has part — IGBT. Traction converters.
4. Step 4. IGBT — is a kind of — Transistor. A power transistor.
5. Step 5. Transistor — is part of — Liquid-crystal display. Thin-film transistors.
6. Step 6. Liquid-crystal display — is part of — Monitor. Then LCDs.

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