Dear Colleagues, This is to announce a new release of our Java application for storage and display of finitely presented categories and functors among them. GDCT is a tool for the creation, editing, display and storage of finitely presented categories. Categories can be opened and saved from local files as well as loaded from a user-specified server. Open categories can be displayed graphically, and the graphical display can be manipulated (in 3 dimensions) and stored. Several tools for testing properties of objects and arrows can be applied. Functors between stored categories can also be created and stored. Open functors can be displayed as diagrams and animated with a domain/codomain display. A built-in help system describes how to use GDCT. The application is available for download at http://mathcs.mta.ca/research/rosebrugh/gdct/ and is linked from http://www.mta.ca/~rrosebru/ Instructions for setting up GDTC are are on the Web pages: - Win9x-XP users may download a zipped archive providing the application and the required Java run-time environment; - Users of other operating systems may download the Java archive for the application and, separately, the appropriate Java run-time environment (to which links are provided); - Source code is available. We are interested in any response from users, and in expanding the database of categories and functors available from the default server, so we would be happy to receive examples from users. We would also appreciate receiving any reports of difficulties in function or usability, as well as suggestions for new functionality. Graphical Database for Category Theory was developed in 1999-2002 by Jeremy Bradbury, Ian Rutherford, M. Graves and R. Rosebrugh with support from NSERC Canada summer research assistantships. We hope that users will enjoy GDCT 2.0. Bob Rosebrugh 12-Jul-2002 14:35:33 -0300,1942;000000000000-00000018