High reliability is important for any business. Free and Open Source software offers high reliability through the most extensive peer-review network possible--thousands of developers and users around the world, all having an opportunity to review the source code and improve on the quality of the code. This leads to mature and more bulletproof software that any closed source vendor can possibly provide. Examples of such high quality, professional, robust, scalable and usable software includes Open Office, Apache, Sendmail, Python, Perl, PHP, Mozilla, and Samba.