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.
One of the earliest sharpeners was invented by Guhl and Hurbeck in 1897 in Germany. It was called the Jupiter Pencil Pointer and weighed 5 lbs. it was 12 inches long and had over 30 cutting edges.