ArcGIS Desktop 9.3 supports Windows Vista, Windows XP, Windows 2003, and winows 2000.
* General drawing Enhancement
1. bookmarks are easier to access and use.
It is more convenient to access bookmarks. You can sort bookmarks and export and load bookmarks between maps and globe in different data boxes.
2. When adding layers to a map, you can pause the annotation to improve the performance.
3. The new "Convert graphics to elements" function allows you to create elements in graphic mode outside the editor toolbar.
The "Convert image to element" dialog box in ArcGIS 9.3.
4. For attribute tables, enhanced functions include support for multi-field sorting and field alias persistence.
5. The legend can be transparent with the layer.
6. The new ArcGIS Desktop resource center makes it easier to add online data to the map.
7. The new error reporting system automatically tracks the error and reports it to ESRI.
* Drawing
1. Enhanced support for curved grids.
2. WYSIWYG editing allows you to better view how editing affects a map.
3. automatically place street addresses.
4. Multiple Viewing Windows
5. Better contour labeling
6. You can use the disperse markers tool to separate the representation point symbols that overlap or close to overlap.
* Modeling and Analysis
1. Better Iterative Modeling
2. Enhanced Contour
3. Enhanced scatter plot
4. A new tool for geographic weight decline helps you understand how the process changes with Space
* 3D display
1. Enhanced kml support
2. Better support for animated time series in 3D
3. Collaborative Design activity (Collada) for better 3D model display support
From: higis.cn http://www.higis.cn/index.php/2008/05/372/