R-7 rocket and smartphone: what they have in common

1. Step 1. R-7 rocket — evolved from — V-2 rocket. The Soviet rocket programme began by studying the V-2 (the R-1 was its copy).
2. Step 2. V-2 rocket — has part — Gyroscope. A gyroscopic guidance system.
3. Step 3. Gyroscope — is part of — Smartphone. A MEMS gyroscope detects the rotation of the phone.

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