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.
Therry des Estwaux of France invented the first mechanical pencil sharpener in 1849. What is a Pencil Sharpener? It is either mechanical or electrical and is used to sharpen the dulled or blunt end end of a pencil to make the graphite end pointer or sharper.