Abstract: A data processing system input device is described. The input device includes a first control device, a second control device, and a device driver. The first control device is capable of moving a cursor in accordance with a direction and magnitude of forces applied to the first control device. The second control device is capable of controlling scrolling in accordance with a direction and magnitude of forces applied to the second control device. The device driver is capable of switching functionality of the first control device with the functionality of the second control device. When the functionality of the first control devices is switched with the functionality of the second control device, the second control device moves the cursor and the first control device controls scrolling.

Abstract: A data processing system input device is described. The input device includes a first control device, a second control device, and a device driver. The first control device is capable of moving a cursor in accordance with a direction and magnitude of forces applied to the first control device. The second control device is capable of controlling scrolling in accordance with a direction and magnitude of forces applied to the second control device. The device driver is capable of switching functionality of the first control device with the functionality of the second control device. When the functionality of the first control devices is switched with the functionality of the second control device, the second control device moves the cursor and the first control device controls scrolling.

Abstract: A muzzle brake comprises a hollow inner sheath including forward, central and rear regions, the rear region adapted for attachment to a firearm and the central region including forwardly inclined apertures therein. The muzzle brake further comprises a hollow outer sheath including forward, central and rear regions, the forward and rear regions, respectively, of the outer sheath being adapted for attachment to the forward and rear regions of the inner sheath. The central region of the outer sheath includes forwardly inclined apertures therein and is spaced from the central region of the inner sheath so as to define a chamber therebetween. The apertures in the outer sheath preferably are staggered and misaligned with respect to the apertures of the inner sheath such that the apertures and chamber redirect the direction of sound waves and discharge gases exiting from the firearm so that the sound waves and discharge gases are redirected so as to move toward a target and away from a shooter.