A ballpoint pen is a writing instrument that uses a small rotating ball at its tip to dispense ink. The ball is typically made of metal, and as it rolls across the paper, it picks up ink from a reservoir and transfers it onto the surface. This design allows for smooth writing and quick drying, making ballpoint pens popular for everyday use. Invented in the 1930s by László Bíró, ballpoint pens have become a staple in offices and schools worldwide. They are available in various colors and styles, often featuring refillable ink cartridges. Their durability and reliability contribute to their widespread appeal.