Holter monitor and aeroplane: what they have in common

1. Step 1. Holter monitor — has part — Flash memory. Recording.
2. Step 2. Flash memory — is part of — Flight recorder. Memory.
3. Step 3. Flight recorder — is part of — Jet airliner. Flight recorders.
4. Step 4. Jet airliner — evolved from — Aeroplane. A jet aircraft.

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