Explanation:

The description 'tangible, physical computer equipment that can be seen and touched' precisely defines 'Hardware.' Hardware encompasses all the physical components of a computer system, including the motherboard, CPU, RAM, hard drive, monitor, keyboard, and mouse. 'Software' is the opposite; it is intangible, consisting of programs and data. 'Storage' refers to hardware components like hard drives or SSDs that retain data, and 'Input/output' refers to devices like keyboards, mice, and printers that allow interaction with the computer. Both storage and input/output are categories of hardware, but 'Hardware' is the overarching term for all such physical equipment.