Paper money and telephone: what they have in common

1. Step 1. Paper money — evolved into — Payment card. The next form of money.
2. Step 2. Payment card — has part — Integrated circuit. An EMV chip.
3. Step 3. Integrated circuit — is part of — Mobile phone. Inside a phone are microchips: processor, memory, radio.
4. Step 4. Mobile phone — evolved from — Telephone. A mobile phone keeps the function of a telephone, replacing the wire with a radio channel.

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