The practical upshot of this is that Linux installations almost always have a substantially lower cost than a comparable commercial installation such as Solaris or Windows. Microsoft's Visual Studio 6.0 (including Visual Basic 6.0, Visual C++ 6.0, Visual InterDev 6.0, Visual J++ 6.0, and Visual FoxPro 6.0) costs $995.00. Under Linux, you get GCC and G++ (C and C++ compilers), BASIC, Java, and database development software, and a literally dozens of other languages, all bundled with the operating system for as little as $1.99, or free if you want to download them.
Add in the cost of Windows NT Workstation or Server ($276 to $4700), Office 97 ($549.65), and so on, and you have spent thousands of dollars, and you'll probably need a recent Pentium-II machine with 512MB of RAM to run it all. Or, you can use a midrange Pentium and get it all free with Linux.