The history of printers in publishing in Western Europe dates back to the mid-15th century with the invention of the printing press. Johannes Gutenberg, a German goldsmith, is credited with developing movable type in the 1450s.[from wikipedia]

String is a long flexible tool made from fibers twisted together into a single strand, or from multiple such strands which are in turn twisted together. String is used to tie, bind, or hang other objects. It is also used as a material to make things, such as textiles, and in arts and crafts.[from wikipedia]