Library Code-ISBN: What do the classification number and ISBN mean?

In order to facilitate management and borrowing, the library codes every book. Coding generally consists of classification number and book number. Classification number is to classify each book and give each book a number according to China Library Classification. When books are shelved in the library, the book number is added after the classification number to form the call number code together with the classification number. ?

Library:

A library is an institution that collects, sorts out and collects books and materials for people to read and refer to. As early as 3000 BC, libraries appeared. Library has the functions of preserving human cultural heritage, developing information resources and participating in social education. Library is the external storage and selective transmission mechanism of social memory (usually expressed in written records). In other words, the library is the memory device and diffusion device of social knowledge, information and culture.