Further to Richard Singer's comments, I have been collecting work on discs for years, and I did have a spate of viruses one year. Now students are told that they will lose a significant number of marks if I find any viruses - so they have all learned to use the virus-checkers. I still virus-check all the discs before going any further, but they have all been clean since I said marks would be lost. ---------------------- Dr Mary Masson Department of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE Tel. 01224 272931 m.masson@abdn.ac.uk ----- chemweb: A list for Chemical Applications of the Internet. Archived as: http://www.ch.ic.ac.uk/hypermail/chemweb/ To unsubscribe, send to listserver@ic.ac.uk the following message; unsubscribe chemweb List coordinator, Henry Rzepa (rzepa@ic.ac.uk)