Unicodes are a standardized system of identifying and encoding characters from various writing systems around the world. Each character is assigned a unique number or code point, enabling computers and other devices to display and recognize them regardless of the language or script used. Unicodes include characters from languages such as Arabic, Chinese, Cyrillic, Greek, Hebrew, Hindi, Japanese, Korean, and Latin, among others. They are widely used in software development, web design, and other digital applications.