Computer information retrieval involves the structure, analysis, organization, storage and dissemination of information. Computer information retrieval system is a combination of hardware resources, system software and retrieval software used for information retrieval. It can store a large amount of information and classify, catalog or index information items (basic information units with specific logical meanings). It can extract specific information from the stored information set according to the user's requirements, and provide the ability to insert, modify and delete some information.
Extended data:
The reliability of computer information retrieval system is closely related to the reliability of computer system. It depends on the reliability of computer system hardware, the recovery mechanism of operating system, the recovery mechanism of database management system and the fault handling measures taken by application software. No computer information retrieval system can guarantee that information will not be destroyed, but it must have the ability to recover from the destruction.
The efficiency of computer information retrieval system is usually measured by missing detection rate, false detection rate, recall rate, precision rate and response time (for online retrieval). If the keyword itself is wrong or the search algorithm used is wrong, it will lead to missed detection.
Baidu encyclopedia-computer information retrieval