Handles and atomic clock: what they have in common

1. Step 1. Handles — is part of — Paper bag. Handles.
2. Step 2. Paper bag — is made of — Paper. Paper.
3. Step 3. Paper — is material for — Globe. The world map is glued onto the ball in paper gores.
4. Step 4. Globe — evolved from — Map. A model of the Earth.
5. Step 5. Map — evolved into — GPS (satellite navigation). Digital navigation on a map.
6. Step 6. GPS (satellite navigation) — uses — Atomic clock. The satellites carry atomic clocks; the position is calculated from signal arrival times.

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