<h2>Turning points are used as a metaphor to indicate major events in history. </h2>
Remember that periodisation is the process where history is divided in chronological segments organised in many ways with analysing purposes. So, in this process, those events that influence others, they call them turning points, because they are the reason of big events in history.
Transistors. The onset of the Information Age can be associated with the development of transistor technology. The concept of a field-effect transistor was first theorized by Julius Edgar Lilienfeld in 1925.
