Unix and r-7 rocket: what they have in common

1. Step 1. Unix — inspired — Linux. A Unix-like system.
2. Step 2. Linux — is used in — Raspberry Pi. Linux.
3. Step 3. Raspberry Pi — is made of — Fibreglass. The board is fibreglass laminate.
4. Step 4. Fibreglass — is material for — Heat shield. Ablative shields are fibreglass with phenolic resin.
5. Step 5. Heat shield — is part of — Soyuz. A heat shield.
6. Step 6. Soyuz — evolved from — R-7 rocket. The Soyuz rocket belongs to the R-7 family.

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