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.
The method through which a trackpad works is relatively simple. A trackpad has a network of transmitters and receivers which are capable of reading very subtle changes in electrical capacitance. A grounding object such as a finger dragged across the soft upper pad of the device alters the electrical current. The change is converted into a signal which the computer can read, resulting in a corresponding movement of the cursor on the screen.