What are the characteristics of short messages and letters? Write at least two.

Letters have a specific format, but short messages don't.

Response time:

The response time of letters should be calculated in days, while short messages are very short;

Save it in different ways.

Length:

Letters are very long, and short messages rarely exceed 50 words.

Different from environmental restrictions.

Content:

Short messages are casual, and letters are formal.

Extension:

Letters are tools for people who are far apart and can't meet for the time being to exchange feelings and thoughts with each other. Letters have a long history and people all over the world use them. Letters play an important role in the history of human communication. Today, mobile phones, telephones and computers are simple and fast communication tools all over the world, and some people are still willing to exchange information by mail. However, due to the arrival of the information age, the format of letters has become diverse, not limited to the original classic format, and some even have no object, that is, there is no preaching and argumentation by the recipient.