Semiconductor and internet: what they have in common

1. Step 1. Semiconductor — includes — Gallium arsenide. A semiconductor.
2. Step 2. Gallium arsenide — is material for — Laser diode. Laser diodes.
3. Step 3. Laser diode — is used in — Optical fibre. The source is a laser.
4. Step 4. Optical fibre — is part of — Internet. The backbones are optical fibre.

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