ア AR （Augmented Reality：拡張現実） ARとは、現実の風景にコンピュータの画像や情報を重ねて表示する技術である。 問題文のように、スマートフォンを史跡に向けたときに、昔の建物の画像や説明を現実の風景に重ねて表示するのはARである。 AR (Augmented Reality) is a technology that overlays computer-generated images or information onto real-world scenes. As described in the question, displaying images or explanations of historical buildings on a smartphone screen over the actual landscape is an example of AR.
イ GUI （Graphical User Interface） GUIとは、アイコンやボタンなどの画面を使って操作できる仕組みである。 現実の風景に情報を重ねる技術ではない。
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