What is USB-host? A USB host device acts as a host to other slave devices. When a USB flash drive connect to a desktop computer, the computer acs as a host, and the USB flash drive acts as a slave device.

Toshiba G900 acts as a USB host connected to a USB keyboard
Most of the time, smartphones acts as slave USB devices, to be connected to computer for data transferring. But some of smartphones have the ability to acts as host USB devices, that is, USB flash drive, SD card reader, keyboard and other USB devices may be connected to these phones. Sometimes, this feature is called USB On-The-Go (or USB GTO).Read more >>
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