Numerical codes are systems that use numbers to represent information or data. They are commonly used in various fields, such as telecommunications, computer programming, and data entry, to simplify communication and processing. For example, the ASCII code uses numerical values to represent characters, allowing computers to understand text. These codes can also be found in everyday applications, like product barcodes, which help identify items in stores. Each barcode consists of a series of numbers that correspond to specific products, making inventory management more efficient. Overall, numerical codes play a crucial role in organizing and conveying information effectively.