Public domain software refers to software that is not limited by copyright. Therefore, it can be used, copied or changed freely, because no one has the right to restrict its use. There are many programs in the public domain, but they are often confused with other types of software, called freeware, which can be obtained for free, or shareware, which is usually obtained for a small fee. Public domain software is the only type, in most cases, to which no limitations apply. Free software can be copyrighted and shareware certainly is. This means that it is essentially not in the public domain. Another person may not reproduce the software, copy it for others, or copy it for sale without violating copyright laws.
The Bible is an example of a public domain work.
The public domain is a broad general term for anything, usually a creative work, that can be used freely. For example, the Bible is a public domain work. It may be used, copied, sold, quoted, translated, or modified without infringing anyone’s copyright or patent privileges. An example of public domain software is GNU, which is part of many PC operating systems.
While you may find listings for public domain software, you are more likely to find listings for free software. In most cases, this software is not really in the public domain. Obtaining it means that you have purchased a license to use it. If you’ve ever installed a computer program for free, you probably had to accept the terms and conditions to use the software. Some of these terms that you agree to may prohibit you from selling, modifying, or benefiting from the software in any way.
There are several free software programs that are not public domain software. For example, you can easily obtain copies of Adobe® Reader®, Netscape®, Internet Explorer® and a variety of other programs. Also, when you buy a computer, you can receive a number of free programs, but again, they are only licensed to you, rather than copied or distributed by you.
You can find public domain software in many places. Some college and university libraries offer downloads and catalogs. Some of the most interesting public domain software is fundamental to the sciences. Programs like WebLab and Visual Molecular Dynamics allow you to create three-dimensional drawings of molecules. A great place to look for public domain software, free software, and shareware is the Free Software Foundation (FSF). You’ll find lists of public domain software and any software that automatically grants you licenses to use specific programs. The FSF is also specific in saying what type of software you are downloading.
