Paper
In 1840 Friedrich Gottlob Keller Invented a machine that could make pulp for paper out of wood fibres (instead of the expensive rag paper). Paper became cheap enough for everyone to buy. Around the same time, other inventions were made, like the pencil, the fountain pen, and a printing press that used steam power. With this new information technology, people wrote more letters, made more books and newspapers, and kept more records of what they did.