When did the following event happen?
The floppy disk is invented at IBM, allowing data to be easily stored and shared between unconnected computers.
Select a space in the timeline below.
490 BCE
The Athenians defeat the Persians in the historic Battle of Marathon, marking a turning point in the Greco-Person Wars.
Note:
BCE means that the date is the number of years before the current era (CE/AD).
c. is short for 'circa' and indicates that the date is considered approximate.