pxaudc (4/Zaurus) - PXA27x USB device controller
SDL_MixAudio (3) - Mix audio data
XChangeKeyboardControl, XGetKeyboardControl, XAutoRepeatOn, XAutoRepeatOff, XBell, XQueryKeymap, XKeyboardControl (3) - manipulate keyboard settings and keyboard control structure
Xau library: XauFileName, XauReadAuth, XauLockAuth, XauUnlockAuth, XauWriteAuth, XauDisposeAuth, XauGetAuthByAddr, XauGetBestAuthByAddr (3) - X authority database routines
xauth (1) - X authority file utility