Compact disc and monitor: what they have in common

1. Step 1. Compact disc — uses — Binary number system. Sound is recorded as numbers.
2. Step 2. Binary number system — is used in — Digital signal processor. It processes a digital signal.
3. Step 3. Digital signal processor — is part of — Ultrasound scanner. Forming the image.
4. Step 4. Ultrasound scanner — has part — Monitor. A screen.

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