How many types of files are there?

The most important thing is that it is divided into printing type, miniature type, machine-readable type and audio-visual type according to the carrier.

1, printing type: it is the most basic way of literature, including lead printing, mimeograph, offset printing, lithograph and other materials. Advantages: you can read directly, which is convenient and fast.

2. Microfilm: A document based on photosensitive materials, which can be divided into microfilm and microfilm. Its advantages are small size and convenient storage, transfer and transportation. But you must use a reader when reading.

3. Computer readable: It is the latest form of carrier. Mainly through coding and programming, files are converted into symbols and machine language, input into computers, stored on magnetic tapes or disks, and then output by computers when reading. It can store a large amount of information, organize it in any form, and extract the required information from it at a very fast speed. The emergence of e-books belongs to this type.

4. Audio-visual type: also known as direct-view type or audio-visual type, it is a file recorded on the carrier in the form of sound and image, such as records, audio tapes, video tapes, science and technology movies, slides, etc.

Extended data:

The role of literature in scientific and social development;

1 is the final expression of scientific research and technological research achievements;

2. It is the best means to spread information in space and time;

3. It is the basic means to confirm the priority of researchers to a discovery or invention;

4. It is an important index to measure the creative labor efficiency of scientific researchers;

5. It is a means for researchers to express themselves and confirm their position in science, so it is an important incentive for researchers to carry out research activities;

6. It is an integral part of the treasure house of human knowledge and the * * * wealth of human beings.

Baidu encyclopedia-literature