Pressurized cabin and programmable logic controller: what they have in common

1. Step 1. Pressurized cabin — is part of — Jet airliner. A pressurized cabin.
2. Step 2. Jet airliner — has part — Autopilot. An autopilot.
3. Step 3. Autopilot — uses — Feedback control. Holding a course by feedback.
4. Step 4. Feedback control — is used in — Industrial automation. Control.
5. Step 5. Industrial automation — uses — Programmable logic controller. Controllers.

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