Thermal print head and gutenberg printing press: what they have in common

1. Step 1. Thermal print head — is part of — Fax. It prints the received image.
2. Step 2. Fax — uses — Telephone. Transmission over a telephone line.
3. Step 3. Telephone — has part — Loudspeaker. The earpiece reproduces the other person’s voice.
4. Step 4. Loudspeaker — is made of — Paper. The cone is paper.
5. Step 5. Paper — is used in — Gutenberg printing press. The impression is made on paper.

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