Potentiometer and payment card: what they have in common

1. Step 1. Potentiometer — is part of — Mixing console. Faders.
2. Step 2. Mixing console — has part — Operational amplifier. Amplifiers.
3. Step 3. Operational amplifier — is a kind of — Integrated circuit. Made as an integrated circuit.
4. Step 4. Integrated circuit — is part of — Payment card. An EMV chip.

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