Web-based Help Gateway - ESRI Support: "Web-based Help Overview ESRI provides Web-based help systems for the products listed below. Web-based help is an up-to-date version of the help system that was shipped with the product; new information has been added and existing topics have been updated as necessary. If you can't find what you're looking for in the help system that shipped with your product, try looking here." This is your one stop for access to web-help for ArcGIS Desktop (9.1 and 9.2), ArcGIS Explorer, ArcGIS Server, ArcIMS and ArcWeb Services.