Sound card and camera: what they have in common

1. Step 1. Sound card — has part — Analog-to-digital converter. ADC/DAC.
2. Step 2. Analog-to-digital converter — is part of — Image sensor. The pixel signal is digitized.
3. Step 3. Image sensor — is part of — Digital camera. Instead of film a digital camera has an image sensor.
4. Step 4. Digital camera — evolved from — Camera. A sensor instead of film.

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