Hello,
Source lines of code (SLOC), also known as lines of code (LOC), is a software metric used to measure the size of a computer program by counting the number of lines in the text of the program's
David A. Wheeler studied the Red Hat distribution of the Linux operating system, and reported that Red Hat Linux version 7.1[4] (released April 2001) contained over 30 million physical SLOC. He also extrapolated that, had it been developed by conventional proprietary means, it would have required about 8,000 man-years of development effort and would have cost over $1 billion (in year 2000 U.S. dollars).
windows and Apple's OSX........ are similar
O___0
Vince.