Java and steam locomotive: what they have in common

1. Step 1. Java — is used in — Android. Apps in Java/Kotlin.
2. Step 2. Android — is used in — Smartphone. The most widespread mobile OS.
3. Step 3. Smartphone — has part — Smartphone camera. One or more cameras.
4. Step 4. Smartphone camera — is part of — Lunokhod. TV cameras.
5. Step 5. Lunokhod — has part — Wheel. Wheels.
6. Step 6. Wheel — is part of — Steam locomotive. The steam engine turns the driving wheels.

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