Tiltrotor and computer: what they have in common

1. Step 1. Tiltrotor — evolved from — Helicopter. A helicopter that turns into an aeroplane.
2. Step 2. Helicopter — is used in — Air ambulance. Helicopters.
3. Step 3. Air ambulance — uses — Aeroplane. Aeroplanes.
4. Step 4. Aeroplane — has part — Landing gear. Landing gear.
5. Step 5. Landing gear — is part of — Lunar module. Legs.
6. Step 6. Lunar module — uses — Computer. The Apollo Guidance Computer.

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