Final answer:
A word processor is not considered hardware because it is a software application, whereas the CPU, monitor, and keyboard are physical components of a computer system.
Step-by-step explanation:
Among the options provided, a word processor would NOT be considered hardware. Hardware refers to the physical components of a computer system, such as the central processing unit (CPU), monitor, and keyboard. In contrast, a word processor is a type of software application used for composing, editing, formatting, and sometimes printing documents.