Drawing instruments have been essential to mathematics, architecture, surveying, navigation, engineering design, and other technical endeavors from antiquity through the 20th century, although ...

Drawing instruments have been essential to mathematics, architecture, surveying, navigation, engineering design, and other technical endeavors from antiquity through the 20th century, although ...

Who could imagine you could draw musical instruments on normal paper with any pencil and then play them with your finger? It is an electronic pencil that lets you make music while you draw. Their ...