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libusb is a library for USB device access from Linux, Mac OS X, Windows, OpenBSD/NetBSD and Haiku userspace. It is written in C (Haiku backend in C++) and licensed under the GNU Lesser General Public License version 2.1 or, at your option, any later version (see COPYING).

libusb is abstracted internally in such a way that it can hopefully be ported to other operating systems. Please see the PORTING file for more information.

libusb homepage:

Developers will wish to consult the API documentation:

Use the mailing list for questions, comments, etc:

(Please use the mailing list rather than mailing developers directly)