1) The first graphical web browser, Mosaic, was released in 1993 and played a key role in popularizing the World Wide Web.

2) The world's first credit card was introduced in 1950 by Diners Club.

3) The first modern health insurance policy was introduced in Germany in the late 19th century.

4) The Arctic Ocean is the smallest and shallowest ocean, located at the North Pole. It is covered by sea ice for much of the year.