Feedback control and tank: what they have in common

1. Step 1. Feedback control — is used in — Anti-lock braking system (ABS). A controller watches for wheel slip.
2. Step 2. Anti-lock braking system (ABS) — evolved from — Air brake. Anti-skid systems first appeared in aviation and on railways.
3. Step 3. Air brake — has part — Compressor. A compressor pumps the air.
4. Step 4. Compressor — is part of — Gas turbine. A compressor.
5. Step 5. Gas turbine — is part of — Tank. Some tanks (T-80, Abrams) have a gas turbine engine.

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