Books can basically be divided into 22 categories: 1. Marxism, Leninism, Mao Zedong Thought, Deng Xiaoping Theory? 2. Philosophy, Religion? 3. General Introduction to Social Sciences? 4. Politics, Law? 5. Military? 6. Economics 7.

Culture, science, education, sports?8, language, literature?9, literature10, art?11, history, geography?12, natural sciences?13, mathematical sciences and chemistry?14, astronomy, earth sciences?15, biological sciences

?16. Medicine, health? 17. Agricultural science? 18. Industrial technology? 19. Transportation? 20. Aviation, aerospace? 21. Environmental science, safety science? 22. Comprehensive book classification method is also called book classification vocabulary

, according to the content, form, genre and reader use of the books, under the guidance of certain philosophical ideas, using the principles of knowledge classification and using logical methods, books in all disciplines are divided into several major categories according to their subject content. Each major

The categories are divided into many subcategories, and each subcategory is divided into subcategories.

Finally, each type of book can be divided into a certain category, and each category has a category number.

?Extended information: Different forms of books: 1. Rope books With language, human beings often use their memory to remember what they hear and then repeat it to others; or they can use their ideals or personal experiences to

language to spread.

This purpose and method are similar to the functions of books in the future. Therefore, it can be called a living book passed down orally.

Human memory is limited after all, and sometimes it goes out of shape. Living books passed down orally must have many flaws.

As a result, smart humans have invented many methods to help memory, the most representative of which is knotting.

The size, tightness, number and color of the knots are used to express various meanings. We can call it a rope book.

2. Bamboo slips (bamboo slips), bamboo slips used for writing in ancient times, also refer to the bamboo slips on which words are written.

Writing materials from the Warring States Period to the Wei and Jin Dynasties.

It is a long and narrow piece of bamboo made by cutting it (there are also wooden pieces, which are called wooden slips). The slips are wider and thicker than the slips. The bamboo slips are called bamboo slips, and the wooden slips are called wooden slips.

All written with brush and ink.

The length of the book is, for example, three feet (about 67.5cm) for writing edicts and laws, two feet and four inches (about 56cm) for copying scriptures, and one foot (about 23cm) for folk letters, so people also call letters "

Ruler slips".

Important discoveries have been made in Changsha, Hunan, Jingzhou, Hubei, Linyi, Shandong, and northwest regions such as Dunhuang, Juyan, Wuwei and other places. Among them, a compiled volume of Eastern Han Dynasty documents was unearthed in Juyan.

3. Pocket book There is no completely accurate definition of pocket book. It generally refers to a book with a format smaller than 32K and a printed sheet of no more than 10 sheets.

The rise of pocket books can be traced back to the "Penguin Series" published in London in July 1935. This series of books sold more than 25 million copies in three years and was a huge success.

Pocket books became popular around the world and triggered a "paper book revolution", which had a profound impact on the publishing industry in European and American countries. It was even listed as one of the human inventions and human inventions of the 20th century along with the American invention of Kodachrome color film.

Among adventures and unusual events.

4. E-books E-books refer to publications that digitize text, pictures, sounds, images and other information content and handheld reading devices that integrate storage and display terminals that embed or download digitized text, pictures, sounds, images and other information content.

device.

It represents digital publications that people read, which are different from traditional publications based on paper.

E-books are digitally recorded in devices using optical, electrical, and magnetic media and must be read, copied, and transmitted with the help of specific devices.