FTP and liquid-propellant rocket engine: what they have in common

1. Step 1. FTP — uses — ARPANET. It appeared on ARPANET.
2. Step 2. ARPANET — evolved into — Internet. ARPANET switched to TCP/IP in 1983 and became the core of the Internet.
3. Step 3. Internet — is made of — Silica (sand). The backbones are silica optical fibre.
4. Step 4. Silica (sand) — is material for — Space Shuttle. The heat-shield tiles are silica fibre.
5. Step 5. Space Shuttle — has part — Liquid-propellant rocket engine. Hydrogen-fuelled main engines.

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