The BattleTag is a player-created name that serves as your Battle.net title. It is used in all Blizzard games, as well as on their forums and community websites. Players create a name of up to 12 characters, and this becomes their official title on Battle.net. Your BattleTag is what other players see on your Diablo III characters, and what appears on their Friends List.
A digital camera records and stores photographic images in digital form. Many current models are also able to capture sound or video, in addition to still images.
It's an input device, but you could argue that the LCD screen (on many cameras) is an output device. Yes. Digital Camera is an input and output device because its has a processor as well as a n LCD disply to show off output images or videos. I belive it is an input device.