関連ワード:  which is the main function of operating system    which is the primary function of operating system    which is the main purpose of operating system    which is the basic functions of operating system    which is the primary purpose of operating system    which is the primary role of operating system    which of the following is the main function of operating system    functions of operating system    which of the following is the primary function of operating system    which of the following is not the main function of operating system  
結果 : which is the main function of operating system