Hardware is typically directed by the software to execute any command or instruction. A combination of hardware and software forms a usable computing system, although other systems exist with only hardware. Some of the earliest computing devices date back
A keyboard is a requisite hardware device of a computer. It is an input device used most commonly, and a dialogue tool between a man and a computer. 鍵盤是計算機的一個必不可少的硬件設備,也是最常用的一種輸入設備,是人與計算機的對話工具。