Carpet sweeper and joystick: what they have in common

1. Step 1. Carpet sweeper — evolved into — Vacuum cleaner. The mechanization of cleaning.
2. Step 2. Vacuum cleaner — evolved into — Robot vacuum. An autonomous vacuum cleaner.
3. Step 3. Robot vacuum — has part — Microprocessor. Control.
4. Step 4. Microprocessor — is part of — Game console. A processor.
5. Step 5. Game console — has part — Gamepad. A gamepad.
6. Step 6. Gamepad — evolved from — Joystick. A game controller.

Open Evothings