ArcGIS 9 was released in May 2004, which included ArcGIS Server and ArcGIS Engine for developers [REF].
At the 2008 Esri Developers Summit, there was little emphasis on ArcIMS, except for one session on transitioning from ArcIMS to ArcGIS Server-based applications, indicating a change in focus for Esri with ArcGIS 9.3 for web-based mapping applications [REF].