1. Written communication refers to the exchange of information and materials with the public in the form of written media, which is mainly used for internal public communication. Its forms include internal newspapers, letters, bulletin boards, slogans and various auxiliary publications.

2. Oral speech refers to written speech or direct impromptu speech.

3. Poster exchange refers to making posters in advance before attending the meeting, providing them to the organizers when attending the meeting, and then displaying them during the meeting. Others can learn by watching posters.

Extended data

1, written communication scenario:

Formal occasions, more solemn, very serious speech, common in meetings, leaders speak to the masses below on the stage.

2, written communication classification:

There are mainly the following written speeches: speeches, experience reports, news statements, work summaries, etc.

3. Advantages of written communication:

It can be formal or informal, long or short.

It enables the author to express himself calmly.

The text can be carefully scrutinized and constantly revised until the personal style is satisfactorily expressed.

Written materials are accurate and credible evidence. The so-called "black and white".

Reference: Baidu Encyclopedia-Written Communication