関連ワード:  what is input device for class 2    what is input device for class 2 with examples    what is output device for class 2    what is input device for grade 2    what is output device for class 2nd    what is input device class 2 answer    what is output device for grade 2    what is input device in computer for class 2    what is input and output devices for class 2    what is output device class 2 short answer