Windows CE is an operating system that was intended for embedded devices such as PDAs. Windows CE for the Dreamcast is a development library developed by Microsoft that was meant to ease the conversion process between Windows programs and Dreamcast programs.
Despite the "compatible with Microsoft Windows CE" mark on the right side Dreamcast consoles, the entire operating system is not present on the Dreamcast, and Windows CE is not embedded into the system as it is with most other Windows CE enabled devices.
Most commercial games do not use Windows CE, and use the Sega-created development library, Katana, instead, which was also used in the Naomi and Naomi2 arcade boards.
Around 50 games use Windows CE for Dreamcast and a few scene and homebrew releases.
Software releases using Windows CE for Dreamcast: