- Considerable waiting time for screen build up may be the result of slow data transfer through the network. Besides Off-Line Internet from harddisk or CD-ROM another possibility for downcutting on waitings times consists in the installation of mirror sites, especially for intercontinental communication.
- The Purdue E-mail box and archive mirror on this site is a partial mirror i.e. the table of contents is mirrored while the E-mail messages are localised at Purdue.