Walkie-talkie and joystick: what they have in common

1. Step 1. Walkie-talkie — has part — Antenna. An antenna.
2. Step 2. Antenna — is part of — Pager. It receives the signal with an antenna.
3. Step 3. Pager — has part — Vibration motor. Vibrating alert.
4. Step 4. Vibration motor — is part of — Gamepad. Vibration.
5. Step 5. Gamepad — evolved from — Joystick. A game controller.

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