usb host

基本解释

Linux's usbcore kernel module supports USB host controllers and USB devices.
Linux 的 usbcore 內核模塊支持 USB 主機控制器和 USB 設備。
Power is supplied by an internal rechargeable battery (lithium-ion prismatic cell), by an external voltage, or through the USB host.
電力由內部充電電池（圓柱形鋰電池）、外接電源或 USB 主機提供。
On the other hand, very few PDAs can be configured to work as USB host devices; if you're willing to put in the time and effort, the 770 can use USB hard drives.
另一方麪，很少有 PDA 設備可以配置成作爲 USB 主機設備來工作；如果您願意花一些時間和精力，770 甚至可以使用 USB 硬磐。

The last item hints that the iPod photo may in fact have some sort of USB Host capability.
ENGADGET: iPod Camera Connector supports iPod photo only, media readers, and USB host?
Most of the changes to Honeycomb are happening under the hood -- better HTML5 support, faster performance, and USB host functionality for connecting peripherals like game controllers and mice -- but there are some improvements that will be a lot more obvious to the user.
ENGADGET: Android 3.1 on the Motorola Xoom: hands-on (video)
Rather than build a full media hub, ASUS appears to be crafting a possibly Roku-like dongle that would graft Google TV on to a host device through USB.
ENGADGET: blogger-avatar