Vacuum cleaner and joystick: what they have in common

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

Open Evothings