Hunting High and Low at 15 in the U.S., according to "Billboard" music charts and has sold about 1.8 million copies in the U.S. It peaked at 2 on the UK charts (re-enter at number 83 in 2015), and hit 1 in Norway. The album has been certified platinum in the United States and 3x platinum in UK. On the "Billboard" 200, "Hunting High and Low" held the record for the highest-charting album by a Norwegian artist until "Do It Again" by Norwegian duo Röyksopp and Swedish singer Robyn (which peaked at number 14). Beginning with the single "Take On Me", A-ha's debut album
High- and low-level classification is typically more concerned with individual components within the system and how they operate. Features which emerge only at a high level of description are known as epiphenomena. Due to the nature of complex systems, the high-level description will often be completely different from the low level one; and, therefore, the (different) descriptions that each deliver are consequent upon the level at which each (differently) direct their study. For example, High- and low-level High-level and low-level, as technical terms, are used to classify, describe and point to specific goals of a systematic operation; and are applied in a wide