Before the days of Napster or Kazaa, people stole music the old fashion way- the cassette tape.  You got what you paid for when it came to tape quality, and if the blank cassette said it was chrome oxide, all was well.  It had something do do with chrome dioxide and ferric-oxide.  What does that mean?  We don't know, but it sure made the recordings sound better!  And if you don't really care about this, check out the old 8 track tape car stereo commercial at the bottom of this page.