VoIP and paper machine: what they have in common

1. Step 1. VoIP — evolved from — Telephone. Telephony over IP.
2. Step 2. Telephone — has part — Loudspeaker. The earpiece reproduces the other person’s voice.
3. Step 3. Loudspeaker — is made of — Paper. The cone is paper.
4. Step 4. Paper — uses — Paper machine. Industrial production.

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