Cybersecurity refers to the preventative techniques used to protect the integrity of networks, programs and data from attack, damage, or unauthorized access.
Pencils were invented in 1795 by a French scientist named Nicolas-Jacques Conte. He used a mixture of graphite, clay and water baked in a kiln to create the lead of the pencil. He then housed this mixture in a wooden frame for writing. Continue Reading.
History of the Pencil Sharpener. At first, penknives were used to sharpen pencils. They got their name from the fact that they were first used to shape feather quills used as early pens. In 1828, Bernard Lassimone, a French mathematician applied for a patent (French patent #2444) on an invention to sharpen pencils.