Information retrieval can be divided into three types according to retrieval methods, namely hardware retrieval, software retrieval and system retrieval. The information stored in hardware devices is the foundation of all software and system retrieval. Only a sufficient amount of storage can ensure the integrity of the information system, provide users with good services, and realize the development and improvement of intelligent systems. The storage of knowledge should be orderly and classified. In the process of storage, attention should be paid to the correlation between knowledge, and the knowledge should be organically related on the basis of systematic classification, which is convenient for users to call knowledge and process information.
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