1) The first modern Olympic marathon race was held at the 1896 Olympics in Athens and has since become one of the most iconic and challenging events in athletics.

2) Online banking and mobile banking have become increasingly popular, providing convenient access to banking services through digital platforms.

3) The first commercially successful video game was "Pong," released in 1972 by Atari.

4) The concept of federalism involves the division of powers between a central government and regional or local governments, allowing for shared governance and autonomy for different levels of administration.