Communication Systems

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Across
  1. 7. hand signs and facial expressions
  2. 9. uses dots and dashes for letters and numbers
Down
  1. 1. puffs of smoke used to send simple messages (historical)
  2. 2. Letter communication
  3. 3. raised dots that people who are blind read with their fingers
  4. 4. uses flags or arms held in positions to show letters
  5. 5. 1s and 0s used by computers
  6. 6. Signing signing by touch for people who are deafblind
  7. 8. picture communication