The Second Peace of Thorn (1466) split Prussia into the western Royal Prussia, a province of Poland, and the eastern part, from 1525 called the Duchy of Prussia, a fief of the Crown of Poland up to 1657.
You can check to see if your computer supports Bluetooth: 1  Look for the Bluetooth icon in the menu bar. 2  Choose System Preferences from the Apple menu, then click Bluetooth. 3  From the Apple menu, choose About this Mac, then click More Info.
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.