Hi Jérôme Actually the USB stack is not integrated with the device managerl. Neither is there direct access to it from userland. The USB module essentially just enables you to use the bus, like the PCI module allows you to use PCI from drivers. The drivers that use the USB module are the ones who publish devices and are accessible from userland. But as the public API of the USB module will be the same as the one in BeOS R5, the existing drivers should continue to work. The usb_raw driver provides "/dev/bus/usb/0/0" for example and is the base for the "USB Kit" that enables userland access to the USB. Also the usb_scsi drivers should work like on R5 and provide mass storage support. So userland access will be available without further work as soon as the public API is available and works. Regards Michael