Mirror and fitness tracker: what they have in common

1. Step 1. Mirror — is part of — DLP chip. Micromirrors.
2. Step 2. DLP chip — uses — MEMS. MEMS mirrors.
3. Step 3. MEMS — is used in — Accelerometer. Modern accelerometers are MEMS devices.
4. Step 4. Accelerometer — is part of — Fitness tracker. A pedometer.

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