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Pros: You can see the signal from kilometers away.

Cons: Few people know how to use it.

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Pros: the blind people can read books and study

Cons: Its use is not common, there are many places that do not include it (for example in banks and other public institutions)

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Pros: People use when they are working on board (maritime work)

Cons: It is a specific communication for maritime or air works

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Pros: you can interact with other people

Cons: some people are afraid to speak in public

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Pros: It is used to send message in difficult conditions

Cons: It is difficult to understand. If you send a message wrong, it will not be understood

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Pros:a lot of people use it

Cons: not secure with personal information

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Pros: You can communicate with people who live far away

Cons: Delivery is slow

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Pros: Are easy way to communicate with people are far away.

Cons: Are dangerous when you aren´t be careful.

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Pros: It is inclusive when you can't hear well.

Cons: Many people don't know how to use it.