Administrators generally refer to the actual individuals or accounts that are responsible for the maintenance or management update of a system or software, and some specifically manage violations of principles. There are also some occasions, such as internet cafes and exchange groups, where administrators are directly called. There are many kinds of administrators, such as network administrators, such as various forums, QQ groups, Baidu Encyclopedia, and Internet cafes, also known as network management, and management and maintenance personnel of various computer rooms. In addition to network administrators, there are librarians.