As AC/DC's official website says,
"More than three decades into a career that shows no signs of slowing down or letting up, AC/DC, like electricity itself, provides the world with an essential source of power and energy.
"Since forming in 1973, AC/DC's high voltage rock 'n' roll has flowed out into the world via consistently sold-out concert tours and global sales totaling more than 150 million albums and counting. Sony BMG Music Entertainment's #1 best-selling catalog act worldwide, AC/DC has sold nearly 70 million albums in the U.S. alone, making AC/DC one of the five top-selling bands in American music history.
"One of the group's best-loved works, the enormously successful and influential "Back In Black," has achieved RIAA "Double Diamond" status, for sales in excess of 22 million copies in the United States, and is the U.S.'s fifth largest-selling album ever."
But they have other albums, of course! Check out the photo gallery for an AC/DC discography.