1. Economic archives: The opening period of most economic archives is 30 years, that is, archives storage institutions usually begin to open archives to the public after that.
2. Educational archives: The opening period of educational archives is relatively short, generally 20 or 25 years, depending on the archives depository and relevant policies.
3. Sci-tech archives: The opening period of most sci-tech archives is 30 to 40 years, which also depends on the regulations and relevant policies of the archives depository.
4. Cultural archives: Books, film and television works and other cultural archives will generally enter the public domain after the copyright expires (usually 50 or 70 years) and can be used and disseminated free of charge. Other types of cultural archives, such as historical relics and artworks, can only be opened or exhibited after being appraised and approved by relevant departments.
trait
1. Economic archives: Economic archives reflect the economic development process, policy formulation and implementation of a country, region or organization, and have important reference value. This kind of files are usually strictly managed by the custody institution, and the opening period is longer, which is later than other types of files.
2. Education files: Education files usually cover the records of education management and teaching management, which can be used to understand the implementation of education systems and policies, school management and teaching quality. The opening period of educational archives is short, because these materials will lose their practical value over time.
3. Science and technology archives: Science and technology archives record the history, achievements and applications of scientific research and technological innovation, and can provide valuable reference materials for scientific and technological workers. The opening cycle of this kind of archives is usually similar to that of economic archives, which needs time to precipitate and accumulate.
4. Cultural archives: Cultural archives cover cultural heritage, literature, art and other aspects, reflecting the cultural development and historical changes of a region. These files are usually appraised by relevant institutions, which is of great significance for the protection and inheritance of cultural wealth. Compared with other types of archives, cultural archives have stronger protection consciousness and management requirements.