The common LY misconception that operating systems such as BSD and Solaris are simply distributions of Linux.
Here is an article that was Digged when FreeBSD 7.2 was released:
FreeBSD launches its new 7.2 version of its OS
The FreeBSD engineering team has released its new 7.2 version of its Linux operating system. This is the second release from the 7 series which improves on the features of FreeBSD 7.1.