Archives can be divided into three categories according to type:
1. Documentary archives (i.e. party and government archives), including administrative agency archives and party and group archives;
< p>2. Science and technology files, including engineering technology, scientific research, capital construction, and resource files;3. Special files, including personnel, accounting, and business performance appraisal files.
First divide into major categories and then into subcategories, and then number them according to time; the confidentiality level is divided into three levels: secret, confidential, and top secret. The classification depends on the specific content of the file. For example, patents are classified as top secret. If you have any questions, please QQ: 779780962