What is OS? What is operating system(操作系统，OS)? What operating system do? An operating system acts as an intermediary between the user of a computer and the computer hardware.The purpose of an operating system is to provide an environment in which a user can execute programs in a convenient and efficient manner. An operating system is software that manages the computer hardware. (From 9th edition). 4口4回，4在4色重刀QC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . What is OS? ▶ What is operating system(操作系统, OS)? ▶ What operating system do? An operating system acts as an intermediary between the user of a computer and the computer hardware. The purpose of an operating system is to provide an environment in which a user can execute programs in a convenient and efficient manner. An operating system is software that manages the computer hardware. (From 9th edition)