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Leopard Technical Q&As: User Experience
Human Interface Device & Force Feedback
The Human Interface Device (HID) class is one of several device classes that the USB standard describes. In Mac OS X, the HID Manager supports access to HID-class devices, such as joysticks and non-Apple displays. For access to devices that provide tactile sensation to the user, the Force Feedback framework defines a programming interface that is functionally similar to Microsoft's DirectInput API. | 
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