What does a bar code represent?

A bar code represents characters through sets of parallel bars that can be read by scanning devices. This technology is designed to encode data in a way that can be easily interpreted by machines, allowing for quick and accurate data retrieval. Each pattern of bars corresponds to specific characters or data, facilitating processes like inventory management, checkout in retail environments, and tracking shipments.

The design of the bar code allows for rapid scanning and processing, which minimizes human error in data entry and speeds up transaction times. By using scanners, businesses can efficiently manage sales and inventory, making bar codes a fundamental element in modern commerce and supply chain management.

In contrast, while bar codes do relate to merchandise, they do not directly represent merchandise themselves or pricing systems. They also do not serve as a method for sorting checks in banks, as their primary function is data encoding rather than bank processing. Overall, option C accurately captures the essence of what a bar code is and its intended use in various sectors.