Please enable JavaScript.

Coggle requires JavaScript to display documents.

INNOVATION (RENAISSANCE (Cell Phone (Cons (very big, very heavy, There are…

- - - - very big
      - very heavy
      - There are only two functions: dialing and answering the phone.
      - need charge for 10 hour
      - expansive
    - - The Birth of Wireless Communication
      - give a basics for the phones later
- - - - It replaces a lot of manual work
      - saves a lot of time.
    - - Plate-making is expensive,
      - printing is expensive
      - plate-making is complicated.