Both services were formally provided by Bibliographies Online and OPeRA, respectively. IEEE Xplore currently offers more than 630,000 documents.
New content is added weekly.
IEEE members must have an IEEE Web Account to access Xplore. Access permissions are determined by a member's society membership. Those references will include links to IEEE-referenced content within IEEE Xplore as well as to referenced content of other publishers. Linked references highly improve the navigation of IEEE Xplore. Additional enhancements are planned for later this year and in 2001.