What are the signs in the library?

No smoking, no photography, no noise, no eating, etc.

When entering the library, you must be dressed neatly, cleanly, generously and appropriately; do not enter in slippers, tank tops, or shorts. Do not bring in excessive personal belongings to prevent theft. If you need to bring them, they should be placed or deposited according to regulations. When entering the library, you should maintain public **** hygiene and public **** order, do not grab the road, crowded, but in order to enter.

Cell phones should be switched off or on vibrate without making noise. Walking should also make as little noise as possible. Do not loiter in the library without anything to do, chase and play, eat, chew gum, or leave trash anywhere. No smoking or spitting.

In our country, the commonly used criteria for dividing the types of libraries are mainly as follows:

1. Divided according to the management system (affiliation) of the library. Such as: cultural system libraries, educational system libraries, scientific research system libraries, labor union system libraries, **** youth league system libraries, military system libraries.

2, according to the scope of the collection of literature. Such as: comprehensive library, specialized libraries.

3. Divided by user groups. Such as: children's libraries, blind libraries, minority libraries.

4, according to the book carrier division. Such as: traditional libraries, digital libraries, mobile libraries, real libraries and so on.

The above content reference? Baidu Encyclopedia-Library