"...Hawaii International Conference on System Sciences (HICSS) is one of the longest-standing continuously running scientific conferences. This conference brings together researchers in an aloha-friendly atmosphere conducive to free exchange of scientific ideas." Link to Digital Library of Proceedings.
International Center for Applied Studies in InformationTechnology. Hosted by George Mason University, the center focuses on policy issues that lead to lead to evaluating the strategic application and use of IT.
"The Institute for Operations Research and the Management Sciences (INFORMS) is the largest society in the world for professionals in the field of operations research (O.R.), management science, and analytics."