Access Permission in Software CONTENTS 1 2 3

Access Permission in Software CONTENTS 1. 2. 3. 4. 5. 6. 7. 8. 9. Free Software Freeware Shareware Commercial Software Open Source Software Public Domain Software Copylefted software General Public Licensed (GPL) software Proprietary Software

Free Software Permission to use, copy, distribute and modified Source code must be available Sometimes called Open Source A matter of liberty, not price Gives freedom to run, study, redistribute and improve the program

Well known free software by category: Operating System Linux (or GNU/Linux) Free. BSD, Open. BSD, Net. BSD GNU/Hurd General Utilities GNU Utilities Programming Languages GNU C/C++ Perl Python Tcl Windows System The X-Windows System XFree 86

Freeware Software can be freely used and redistributed. (zero price) Freeware often come with no source code. Freeware is not free software in which freedom to modify and improve is the concern. e. g. Acrobat Reader, Power. Archiver, Real Player

Shareware Software distributed on the basis of an honor system. Most shareware is delivered free of charge, but the author usually requests that you pay a small fee if you like the program and use it regularly. By sending the small fee, you become registered with the producer so that you can receive service assistance and updates. You can copy shareware and pass it along to friends and colleagues, but they too are expected to pay a fee if they use the product. Shareware is inexpensive because it is usually produced by a single programmer and is offered directly to customers. Thus, there are practically no packaging or advertising expenses.

Shareware It sometimes refers to commercial software that is copyrighted. Initially it is free of charge but later you have to pay for continue use. N. B. Note that shareware differs from publicdomain software in that shareware is copyrighted. This means that you cannot sell a shareware product as your own.

Commercial Software Commercial software is any software or program that is designed and developed for licensing or sale to end users or that serves a commercial purpose. Commercial software was once considered to be proprietary software, but now a number of free and open-source software applications are licensed or sold to end users. Off-the-shelf software programs, such as games or those sold in computer specialty stores or even music stores and grocery stores, are some examples of commercial software. Microsoft products such as the Windows Operating System and MS Office are some of the most well-known examples of commercial software. Used most often Copyrighted Generally costly May not be copied without permission of the manufacturer

Purchasing Commercial Softwarehouse store Mail order Electronic software distribution Volume discount Site license Network versions Application Service Provide (ASP) Software is setup and maintained by ASP Access the software over the Internet Pay per use Saves the expense of installing and maintaining the software

Open Source Software Open source software is software with source code that anyone can inspect, modify, and enhance. "Source code" is the part of software that most computer users don't ever see; it's the code computer programmers can manipulate to change how a piece of software—a "program" or "application"—works. Programmers who have access to a computer program's source code can improve that program by adding features to it or fixing parts that don't always work correctly.

Public Domain Software Public domain software is not copyrighted. Public domain software is any software that has no legal, copyright or editing restrictions associated with it. It is free and open-source software that can be publicly modified, distributed or sold without any restrictions. SQLite, I 2 P and CERN httpd are popular examples of public domain software.

Copylefted software Copyleft is free software license requiring copyright authors to permit some of their work to be reproduced. With copyright law, authors have complete control over their materials. But with copyleft law, users and authors co-exist. Users are permitted to engage in copying and distributing copyrighted materials. However, authors do have some say in who uses the materials based on their intended use. Copyleft does not require source code distribution. Thus, copyleft grants users similar rights to those normally only granted to the copyright authors, including activities such as distribution and copying.

General Public Licensed (GPL) software Short for General Public License, the license that accompanies some open source software that details how the software and its accompany source code can be freely copied, distributed and modified. The most widespread use of GPL is in reference to the GNU GPL, which is commonly abbreviated simply as GPLwhen it is understood that the term refers to the GNU GPL. One of the basic tenets of the GPL is that anyone who acquires the material must make it available to anyone else under the same licensing agreement. – webopedia The GPL does not cover activities other than the copying, distributing and modifying of the source code. A GPL is also referred to as a copyleft, in contrast to a copyright that identifies the proprietary rights of material.

Proprietary Software (Closed Source software) means the company that developed the software owns the software and no one can duplicate it or distribute it with out that’s company’s permission. Users have to pay the company if they want to use the Proprietary Software. Ex. Microsoft office Adobe Photoshop cs 3 Adobe flash cs 3 Corel office x 3 Windows 7

Thank You