Mastodon WORD STACKS - LEVEL 534 - USED IN COMMUNICATION

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WORD STACKS - LEVEL 534 - USED IN COMMUNICATION

Hint: Used in communication
The answer to this puzzle is:
1. PENCIL
2. CRAYON
3. ESSAY
4. PAPER
5. SCAN
6. NOTE
7. SPEAKER
8. VIDEO
9. SATELLITE
10. GESTURE
11. SIGN
12. PHONE