A stylus is a pen-shaped tool used for writing, drawing, or tapping on screens and tablets. Modern styluses work with iPads, drawing tablets, and smartphones, letting you sketch, take notes, or select things more precisely than you could with your finger. Artists use styluses with pressure-sensitive tips that make thicker or thinner lines depending on how hard they press, just like a real pencil or paintbrush.

In ancient Rome, a stylus was a pointed metal or bone tool used to scratch letters into wax tablets (imagine writing by carving into a crayon). When you finished, you could smooth the wax with the flat end and write again, making it like the world's first reusable notebook.

Some styluses today work through clever technology: they might use Bluetooth to communicate with your device, or special tips that conduct electricity to interact with touchscreens. Others, like the Apple Pencil, can detect the angle you're holding them at, making digital drawing feel remarkably close to using actual art supplies. Whether you're annotating a book, solving math problems, or creating digital art, a stylus gives you the control and precision that fingertips just can't match.