FTP, name this island of the western Pacific divided mostly between Malaysia and Indonesia.
While mentioned in Ptolemy's Guide to Geography around AD 150, civilizations have existed on this island as early as the 5th century BC.  Its aboriginal inhabitants, the Dayaks, live primarily in the southwest opposite such cities as Pontianak and Balikpapan.  Sabah and Kalimantan, two of its regions neighbor another political entity, the British protectorate of Sarawak. On the northwest of this third largest island in the world lies the sultanate of Brunei.  FTP, name this island of the western Pacific divided mostly between Malaysia and Indonesia.
While mentioned in Ptolemy's Guide to Geography around AD 150, civilizations have existed on this island as early as the 5th century BC.  
Borneo