information-retrieval As a command 5 categories below information-retrieval Narrow by artificial-intelligence 2 computational-linguistics 2 humanities 2 information-science 2 linguistics 2 natural-language-processing 2 computer-operation 1 data-operation 1 data-processing 1 event 1 information-extraction 1 process 1 information-extraction 1data-retrievalfaceted-searchfull-text-searchnamed-entity-recognition