Ballpoint pen - Wikipedia
A ballpoint pen, also known as a biro (British English), ball pen (Philippine English), or dot pen is a pen that dispenses ink (usually in paste form) over a metal ball at its point, i.e. over a "ball point". The metal commonly used is steel, brass, or tungsten carbide. The design was conceived and developed as a cleaner and more reliable alternative to dip pens and fountain pens, and it is ...
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