Movement and the Open Source Movement are documented on FSF's Web site at

  {\tt http://www.fsf.org/licensing/essays/free-software-for-freedom.html}.}

those who call the software ``Open Source'' are often focused on a side

issue.  Specifically, user access to the source code of a program is a

prerequisite to make use of the freedom to modify.  However, the important

issue is what freedoms are granted in the license of that source code.

Software freedom is only complete when no restrictions are imposed on how

these freedoms are exercised.  Specifically, users and programmers can

exercise these freedoms noncommercially or commercially.  Licenses that grant

these freedoms for noncommercial activities but prohibit them for commercial

activities are considered non-free.  Even the Open Source Initiative

(\defn{OSI}) (the arbiter of what is considered ``Open Source'') also rules

such licenses not in fitting with their ``Open Source Definition''.

In general, software for which most or all of these freedoms are

restricted in any way is called ``non-Free Software.''  Typically, the

term ``proprietary software'' is used more or less interchangeably with

``non-Free Software.''  Personally, I tend to use the term ``non-Free

Software'' to refer to noncommercial software that restricts freedom

(such as ``shareware'') and ``proprietary software'' to refer to

commercial software that restricts freedom (such as nearly all of

Microsoft's and Oracle's offerings).

\subsection{The Freedom to Run}

For a program to be Free Software, the freedom to run the program must

be completely unrestricted. This means any use for software the user

can come up with must be permitted. Perhaps, for example, the user

has discovered an innovative use for a particular program, one

that the programmer never could have predicted. Such a use must not

be restricted.

It was once rare that this freedom was restricted by even proprietary

software; today it is not so rare. Most End User Licensing Agreements

(EULAs) that cover most proprietary software restrict some types of

use.  For example, some versions of Microsoft's FrontPage software

prohibit use of the software to create Web sites that generate

negative publicity for Microsoft. Free Software has no such

restrictions; everyone is free to use Free Software for any purpose

whatsoever.

\subsection{The Freedom to Change and Modify}

Free Software programs allow users to change, modify and adapt the

software to suit their needs. Access to the source code and related build

scripts are an essential part of this freedom. Without the source code