This report summarizes much of the data collected through the 2005 EDUCAUSE core data survey about campus information technology (IT) environments at 933 colleges and universities in the U.S. and abroad. The report presents aggregates of data through more than 100 tables and accompanying descriptive text in five areas relevant to planning and managing IT in higher education: IT Organization, Staffing, and Planning; IT Financing and Management; Faculty and Student Computing; Networking and Security; and Information Systems. Appendices include: a brief historical context; a list of participating campuses; the 2005 survey instrument; a glossary of terms from the survey; and Carnegie classification definitions. An index is also included. (Contains 115 tables.)