Macbeth already had plans to murder Macduff after his encounter with the Witches (4.1.83), but Macduff's trip to England so antagonizes Macbeth that he orders the slaughter of Macduff's entire household, culminating in this horrifying scene.
trackball-Computer Definition. A stationary pointing device that contains a movable ball rotated with the fingers or palm. From one to four keys are located in various positions depending on the unit.rackball-Computer Definition. A stationary pointing device that contains a movable ball rotated with the fingers or palm. From one to four keys are located in various positions depending on the unit.
Some trackballs have notably low friction, as well as being made of a dense material such as glass, so they can be spun to make them coast. The trackball's buttons may be situated to that of a mouse or to a unique style that suits the user. Large trackballs are common on CAD workstations for easy precision.