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Copyleft symbol Copyleft (a play on the word copyright) is the practice of using copyright law to offer the right to distribute copies and modified versions of a work and requiring that the same rights be preserved in modified versions of the work. In other words, copyleft is a general method for marking a creative work as freely available to be modified, and requiring all modified and extended versions of the creative work to be free as well.[1] Copyleft is a form of and can be used to maintain copyright conditions for works such as computer software, documents, and art. In general, copyright law is used by an author to prohibit recipients from reproducing, adapting, or distributing copies of the work. In contrast, under copyleft, an author may give every person who receives a copy of a work permission to reproduce, adapt or distribute it and require that any resulting copies or adaptations are also bound by the same licensing agreement. Reciprocity[edit] History[edit] Some[who?]

Wine (software) Wine is a free and open source software application that aims to allow applications designed for Microsoft Windows to run on Unix-like operating systems. Wine also provides a software library, known as Winelib, against which developers can compile Windows applications to help port them to Unix-like systems.[3] The name Wine initially was an acronym for windows emulator.[7] Its meaning later shifted to the recursive backronym, wine is not an emulator in order to differentiate the software from CPU emulators.[8] While the name sometimes appears in the forms WINE and wine, the project developers have agreed to standardize on the form Wine.[9] The phrase "wine is not an emulator" is a reference to the fact that no processor code execution emulation occurs when running a Windows application under Wine. Wine officially entered beta with version 0.9 on 25 October 2005.[18] Version 1.0 was released on 17 June 2008,[19] after 15 years of development. Software that runs flawlessly ("Platinum")

GNU Project The GNU logo, by Etienne Suvasa The GNU Project i/ɡnuː/[1] is a free software, mass collaboration project, announced on 27 September 1983, by Richard Stallman at MIT. Its aim is to give computer users freedom and control in their use of their computers and computing devices, by collaboratively developing and providing software that is based on the following freedom rights: users are free to run the software, share it (copy, distribute), study it and modify it. GNU software guarantees these freedom-rights legally (via its license), and is therefore free software; the use of the word "free" always being taken to refer to freedom. In order to ensure that the entire software of a computer grants its users all freedom rights (use, share, study, modify), even the most fundamental and important part, the operating system (including all its numerous utility programs), needed to be written. Origins[edit] GNU Manifesto[edit] Philosophy and activism[edit] Participation[edit] Free software[edit]

SoftwareCenter Ubuntu Software Center is a one-stop shop for installing and removing software on your computer. It is included in Ubuntu 9.10 and later. In Ubuntu 9.10, 10.04, 10.10, and 11.04 (Classic environment): Open the “Applications” menu. In Ubuntu 11.04 (Unity environment) and Ubuntu 11.10: Ubuntu Software Center is in the Launcher. The interface is simple and easy to work with, especially once you know how to navigate around. This is the main area of USC. Now to figure out how to use Ubuntu Software Center for its main purpose: installing applications! Clicking on a subcategory will further filter the list of applications, making it easier to find what you are looking for. Next, you highlight the application's listing. Either from the application's details, or from the previous list of applications, users have the option to click “Install.” Note: You may notice that the “Install” button on the applications description page also says that the software is Free. 1 - start up the computer