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One of the things that make our human civilization what it is writing. Without it, great ideas would be forgotten, information would stay at the place where they originated and we would have to invent things a thousand times over. To write we have writing implements that changed throughout history.
Pencil practically cannot be used without some kind of pencil sharpener. Were they simple knives or complex machines with many rotating elements, their purpose is to make a fine point to a pencil. Read more about pencil sharpener history, facts and types.
Reed pens are one of the first more sophisticated writing tools in history. They appeared after the carving tools and styluses and practically replaced them. They were not perfect and were later replaced with quills. Read more about history of reed pens.
When schools and classrooms started to grow, in 19th century, a problem appeared: how to transfer lectured information to a greater number of students. Solution was at first in a blackboard and chalk and later in whiteboard and whiteboard pen. Read more about history of blackboard chalk and whiteboard pen.