Halos is the name of a demonstration application first presented by Microsoft during the WinHEC 2005. The application used the Windows Presentation Foundation (codenamed Avalon) to rotate multiple two-dimensional images in three-dimensional space across a screen, and was also shown during the Professional Developers Conference in 2005.
- Wilson, Derek; Walton, Jarred. (April 29, 2005). "WinHEC 2005: Coverage Wrap"
- Thurrott, Paul. "PDC 2005 Photo Gallery: Build 5219 features (Day 0)"