The Digital Library of the American Computer Association ACM (Association for Computing Machinery) is the most comprehensive database of full-text articles and bibliographic records focused on computing and information technology. It contains all publications published by ACM (professional journals, conference proceedings, technical magazines, newsletters, books), along with the extensive bibliographic database of The ACM Guide to Computing Literature (records and abstracts of Computer Science articles and books published by other publishers). The publications are classified according to the ACM Computing Classification System.