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.
In this post I explain the optics of an SLR and compare it to viewfinders from mirrorless cameras. A single-lens reflex camera uses a mirror (hence the term reflex) and a pentaprism that allows the photographer to look through the lens and see exactly what will be captured in the photograph. A digital single lens reflex camera is a camera that combines the optics of an SLR with a digital imaging sensor.