Which of the following is a common computing device?

• A. Printer
• B. Smartphone
• C. Monitor
• D. Keyboard

Answer: (B)

A device that can perform computations, run software, and store data is a computing device. A smartphone fits this because it has a processor, memory, storage, and an operating system, and it can run apps, browse the web, play media, and perform many tasks without needing another computer. The other items are peripherals: a printer outputs documents, a monitor displays output, and a keyboard provides input. They enable or interact with computing systems but don’t typically perform general-purpose computing on their own. So the smartphone is the common computing device here.