IEEE Xplore, under the banner of the Institute of Electrical and Electronics Engineers, provides full text access technical literature in electrical engineering, computer science, and electronics. Content includes electronic journals, magazine, and books; conference proceedings; standards; and Standards Dictionary Online. Most articles are available in PDF and HTML. Tools include links to citations, references and figures.
API features are available through the IEEE Xplore API Portal with account registration and application for an API key: https://developer.ieee.org/