ACM。 It's good. ACM and SCI are both widely used literature index databases in the field of science and technology, but their main uses and characteristics are slightly different. ACM is an important academic organization in the computer field. ACMDigitalLibrary is a database containing various documents in the computer field, mainly including academic papers, periodical articles, conference papers and other literature resources in computer science, computer engineering, software engineering, information technology, artificial intelligence and other related fields. ACMDigitalLibrary is characterized by its wide coverage, including a large number of top journals and conference papers in the computer field, which is of great reference value to researchers in the computer science field. SCI is a literature index database created by ClarivateAnalytics Company of the United States, which mainly includes academic papers, periodical articles, conference papers and other literature resources in various natural sciences, including mathematics, physics, chemistry, biology, earth sciences and other fields. SCI is characterized by a complete collection of literature resources in the field of natural science and a wide coverage, which has important reference value for researchers in the field of natural science.