ACM guide to computing literature

The online version contains "over 600,000 citations from over 3,000 publishers, as well as from ACM, to books, journal articles, conference proceedings, doctoral dissertations, master's theses, and technical reports. Full citations consist of title, author, publication data, and, when available, abstracts, citings (where the paper has been referenced by other papers), references (by the paper to other papers), index terms from ACM's Computing Classification System (CCS), reviews from ACM's Computing Reviews, and links to the citations as they appear on the publisher's site."