ERes makes use of short, intuitive, on-screen forms together with point-and-click interface to make it quick and easy to put documents of any format - word processor files, Excel spreadsheets, and hand-written homework solutions, for example - on "reserve" on the World Wide Web. The structure of the ERes system is built around the academic course: every course in the system has its own "page," which can be customized to suit the needs of an individual course or instructor. Instructors can post announcements and other information, as well as links to other Web resources in addition to regular documents. The ERes system was also designed to require no day-to-day maintenance.