What are the three key parts of computer hardware?

• A. Storage, Input/Output, Compute
• B. Processor, RAM, Storage
• C. Keyboard, Mouse, Monitor
• D. Network, Power, Case

Answer: (A)

Think of computer hardware in three broad functional blocks: compute, storage, and input/output. Compute is the brain—the CPUs and other processors that execute instructions and perform calculations. Storage is where data and programs live when not being actively processed, covering both fast memory and long-term storage like disks or flash. Input/Output are the channels that connect the computer to the outside world—the devices and interfaces that bring data in and send results out, such as keyboards, displays, network adapters, and other peripherals.

The other choices fall short because they focus on specific components rather than the overarching ways a computer operates. One option lists components like the processor, RAM, and storage, which are important parts but don’t name the separate I/O and processing role as a whole. Another option centers on peripherals, which are examples of I/O devices rather than the fundamental hardware domains. The last option includes items like the case and power or network hardware, which aren’t the three essential functional blocks that define computer hardware.