Mop and modem: what they have in common

1. Step 1. Mop — is made of — Cotton. A mop is cotton strands.
2. Step 2. Cotton — is material for — Vacuum cleaner. The dust bag is a cloth bag.
3. Step 3. Vacuum cleaner — evolved into — Robot vacuum. An autonomous vacuum cleaner.
4. Step 4. Robot vacuum — has part — Microprocessor. Control.
5. Step 5. Microprocessor — includes — Digital signal processor. A specialized processor.
6. Step 6. Digital signal processor — is part of — Modem. Signal processing in high-speed modems.

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