Sequential tracking of every point of an image to be reproduced or processed. A light reader scans the image point-by-point and line-by-line. The reflection of each point of the image is detected by a photoelectric cell and the average value is stored in the memory of a computer, to later compose an image.
A unitary series of banknotes of different denominations that form a monetary system. The first series of euro banknotes, issued on 1 January 2002, contains seven denominations (€5, €10, €20, €50, €100, €200 and €500).