Turbojet engine and gutenberg printing press: what they have in common

1. Step 1. Turbojet engine — is made of — Titanium. Compressor blades.
2. Step 2. Titanium — is material for — Electronic ink. The white particles are titanium dioxide.
3. Step 3. Electronic ink — is part of — E-reader. An electronic ink screen.
4. Step 4. E-reader — evolved from — Codex (book). An electronic book.
5. Step 5. Codex (book) — is used in — Gutenberg printing press. The press printed sheets that were bound into codex books.

Open Evothings