関連ワード:  what is operating system and its characteristics    what is operating system and its features    what is operating system and its features in hindi    what is the introduction operating system and its characteristics    what is operating system and its types and characteristics    what is operating system explain its characteristics    what is windows operating system and its features    what is linux operating system and its features    what is unix operating system and its features    what is android operating system and its features  
結果 : what is operating system and its characteristics