Inside and outside views of the geode. Geodes (Greek Î³ÎµÏÎ´Î·Ï - ge-ÅdÄs, earthlike) are geological secondary structures which occur in certain sedimentary and volcanic rocks.eodes (Greek Î³ÎµÏÎ´Î·Ï - ge-ÅdÄs, earthlike) are geological secondary structures which occur in certain sedimentary and volcanic rocks.
National Science Foundation took the management in 1990 and then it was known as NSFinet which further contributed with its researches by connecting it to ESNET in universities of North America. The use of internet was exploded after 1990. In 1992 internet access was available for common public and its use exploded.
the internet. is a network of computer networks. It was started by the U.S. Department of Defense and in its early years was used primarily by scientists. The current Internet started in the 1980s thanks to the efforts of the National Science Foundation.