Most distributed software can be categorized according to their license type (see table). The identification of proprietary software licenses is that the software publisher grants the use of one or more copies of software as part of the end-user licensing agreement (EULA), but ownership of those copies remains within the purview of the software publisher (hence, the term “owner”). This proprietary software licensing feature means that certain software rights are reserved by the software publisher. Therefore, it is typical of the EULAs to include terms that define the use of the software, such as the number. B of authorized facilities or distribution conditions. When you purchase software, you purchase the right or license to use the software in accordance with the BOARD. A typical software license gives the licensee, usually an end user, permission to use one or more copies of software in a way that might otherwise constitute a copyright infringement of the software owner`s exclusive rights under copyright. In the United States, Section 117 of the Copyright Act gives the holder of a specific copy of the software the explicit right to use the software with a computer, even if the use of the software with a computer requires the manufacture of random copies or adaptations (acts that could constitute copyright infringement). Therefore, the owner of a copy of computer software has the legal right to use this copy of the software. Therefore, if the end user is the software The owner of the respective copy, the end user can legally use the software without the software publisher`s license.
An example of a copyleft free software license is the GNU General Public (GPL) license, which is also the first copyleft license. The purpose of this license is to give and protect all users to unlimited freedom, to use, study and modify the software privately, and if the user complies with the GPL`s terms, to disseminate the software or make changes to it. For example, all changes made and retouched by the end user must contain the source code of these and the license for derivative works should not result in additional restrictions beyond what the GPL allows.  Free and open-source licenses are generally categorized into two categories: those that aim to have minimum software transmission requirements (licenses allowed) and protection authorizations (copyleft licenses).