Graph theory and headphones: what they have in common

1. Step 1. Graph theory — is used in — Dijkstra’s algorithm. A graph algorithm.
2. Step 2. Dijkstra’s algorithm — is a kind of — Algorithm. An algorithm.
3. Step 3. Algorithm — is used in — MP3. A compression algorithm.
4. Step 4. MP3 — is used in — MP3 player. The MP3 format.
5. Step 5. MP3 player — has part — Headphones. Headphones.

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