Compact cassette and r-7 rocket: what they have in common

1. Step 1. Compact cassette — has part — Magnetic tape. Tape inside a cassette.
2. Step 2. Magnetic tape — is made of — Paper. Pfleumer’s first tape was paper coated with magnetic powder.
3. Step 3. Paper — is material for — Rocket. The first rockets were paper tubes filled with gunpowder.
4. Step 4. Rocket — is used in — Launch complex. Launching rockets.
5. Step 5. Launch complex — is used in — R-7 rocket. Baikonur.

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