Which feature differentiates digital calipers from dial calipers as per the source?

• A. LCD display
• B. Vernier scale
• C. Computer port
• D. Main measuring scale

Answer: (C)

Digital calipers add electronics to read and often transfer measurements, while dial calipers are purely mechanical with a moving dial. The strongest differentiator is the ability to connect to a computer or data system via a computer port. That port lets you output measurements to a computer, printer, or data logger, which dial calipers cannot do because they lack electronic interfaces. The display type (LCD) and the presence of a measuring scale or a vernier are not as definitive—digital calipers may show measurements on an LCD, but dial calipers use a mechanical dial, and the other features don’t capture the fundamental capability that digital models add: data connectivity.