When we take a top-tier view of the amount of code showing up inside of Linux today that is either directly related to our Unix System 5 that we directly own or is related to one of our flavors of Unix that we have derivative works rights over—we don't necessarily own those flavors, but we have control rights over how that information gets disseminated—the amount is substantial. We're not talking about just lines of code; we're talking about entire programs. We're talking about hundred [sic] of thousands of lines of code.

(16 June 2003)

Why SCO decided to take IBM to court - CNET News