Describe the role of the operating system. How does it help you interact with a computer?

When you power on a computer it first reads the instructions stored in ROM which tells the computer how to start itself up and begins to carry these instructions out. This is also called booting up, that is pulling oneself up by one’s own bootstraps. The computer will finish this step automatically and what all the users need to do is push the button to power it on.
Then here comes the operating system when you turn on your computer successfully. The operating system is a program which can interact with you. For example, you need to save data, or you need to open a document, or you want to delete a file, etc. Then what will you do? You probably will click a mouse button. And then the computer will delete that file or save that data or open that document for you “automatically”. Well, can the computer “automatically” do these things? Because there is a special program in the computer that can accomplish doing these according to your command (you click a save button that is your command to save something). This special command is called operating system. We can also understand this program by its name: operating system is a system that helps you to operate the computer.
The operating system should be convenient to use because operating system is a external software that interact with users. There are two most popular operating systems today from two different companies: windows from Microsoft Company and Macintosh OS from Apple Company.
Another thing needs to say is that there also other kinds of software in the computer. Like if you want to play a piece of music or want to play a video or want to type in a document like I am doing now, you may need another kind of software called application programs. During this process the operating system will offer users a platform through which the users can finish their jobs. Let us take an instance of typing a document with Microsoft word. If you want use the word to type a test you need to click the word button in the operating platform and the operating system will open the word for you. When you finish typing you click the save menu in the operating system and the operating system will save the file in the word format for you.
You can tell the operating system is like a general commander and the application software is like soldiers and you are like the president. Then if you may want to know where the officer is, like captain and here is the answer: since each piece of application software can only do a single task, some companies collect some popular application software and bundle them into a “suite”, like Microsoft office which includes word, excel, power point and some other software.