OKAY source. Use the "Advanced Search"; can also be used as a tool to focus a broad search (try out search terms, find a possibility, search that possibility in a disciplinary database, and then use the indexing to more precisely find additional papers).
BETTER source; 1970–present. The largest single periodical resource available, bringing together dozens of full-text databases across all major subject areas, including Business, Education, Health and Medical, Humanities, Science and Technology, and the Social Sciences.
BEST source; full text of every article ever published by the Association for Computing Machinery (ACM), whether in journals, transactions, magazines, newsletters, SIGs, or conference proceedings, plus bibliographic citations from other major publishers in computing.