Hieroglyphic pictograms came after the beginning of abstract writing as we know it.
The sign features not only a pictogram (a crossed-out baby seat) but also the words "ADULT ONLY".
In a pictogram, the pictures should be clear and easily identifiable and the quantity that each picture represents must be given in a key to the chart.
The public will be informed about the dangers of chemicals through pictograms which shall indicate the risks concerning explosions, fire, cancer and poison.
Symbols and pictograms which can be readily identified by the public are actively encouraged as a means of simplifying essential messages.
One of the main advantages of this system is the use of universal hazard pictograms.
