Iron age followed the stone era in African civilization. It is a period of use of iron and steel. The middle age occurred between 5th and 15th century.
information age presents six civilizations from the stone era to the information age. Other sections include data processing and history of computers.
Stone age is a primitive period of civilization marked with the use of stone tools. In bronze age, bronze tools were made to replace the stony implements.
Graphics packages are application software that can be used to create and manipulate images on a computer. Computer graphic can be raster or Vector graphic.