A ballpoint is a type of pen that uses a small rotating ball at its tip to dispense ink. This design allows for smooth writing and prevents the ink from leaking or drying out. The ink is usually oil-based, which helps it dry quickly on paper, making it a popular choice for everyday writing tasks. Invented in the 1930s by László Bíró, the ballpoint pen has become a staple in offices and schools around the world. Its simple mechanism and reliability have made it a preferred writing instrument for millions, often replacing older styles like fountain pens.