Who invented pen?
Who invented the pen? How was it invented?
What is the pen? Who invented the Pen Drive, CD, and DVD? What is pen? Who invented WordPad? What was the importance of this invention? Who invented words? Who invented swear words? Why were they invented? When was the first kiss invented? Who invented homework, and why was it invented? How was the toothbrush invented? Who invented the internet and when was it invented? Which is the best pen you have ever used? What is the first thing that humans invented? Who invented the scientific method and how did he/she invent it? Who invented Auslan? Why was it invented? Who invented library? How was it invented? Who invented the mouse and when? Who invented the washing machine? Who invented the Post-it? Who invented pulleys and gears? How were they invented? Who invented the automobile? Who invented the clock? Who invented calligraphy? How did this invention impact the world? Where and how were toothbrushes invented? What things were invented in ancient Rome? What is the scientific method? Who invented it? What was invented in 2003? How do you make a pen? Who invented the first mouse? Who Invented the internet and how was it first used? What was the greatest invention of the last 200 years?