A 📇 is a small, rectangular piece of cardstock commonly known as an index card. It serves as a portable and convenient tool for organizing and storing information. Its compact size makes it easy to carry and its ruled lines allow for neat writing or drawing. Index cards are often used for creating flashcards, jotting down notes, making to-do lists, or structuring ideas. They provide a tangible and tactile way to index and access important details, making them a versatile tool for various educational, professional, and personal purposes.