OpenBSDOpenBSD is a security-focused, free software, Unix-likeoperating system based on the Berkeley Software Distribution (BSD). Theo de Raadt created OpenBSD in 1995 by forkingNetBSD 1.0. The OpenBSD project emphasizes portability, standardization, correctness, proactive security, and integrated cryptography. The OpenBSD project maintains portable versions of many subsystems as packages for other operating systems.
GNU ProjectThe GNU Project ( ) is a free software, mass collaboration project announced by Richard Stallman on September 27, 1983. Its goal is to provide computer users freedom and control in their use of their computers and computing devices by developing and publishing software collaboratively that grants everyone the right to freely run, copy, distribute, study, and modify it. GNU software grants these rights in its license.
Free software movementThe free software movement is a social movement with the goal of obtaining and guaranteeing certain freedoms for software users, namely the freedoms to run, study, modify, and share copies of software. Software which meets these requirements, The Four Essential Freedoms of Free Software, is termed free software.
CopyleftCopyleft is the legal technique of granting certain freedoms over copies of copyrighted works with the requirement that the same rights be preserved in derivative works. In this sense, freedoms refers to the use of the work for any purpose, and the ability to modify, copy, share, and redistribute the work, with or without a fee.
Berkeley Software DistributionThe Berkeley Software Distribution, also known as BSD or Berkeley UNIX, is a Unix based operating system developed and distributed by the Computer Systems Research Group at the University of California, Berkeley. BSD released in 1978, it began as an improved derivative of AT&T's original Unix developed at Bell Labs. Bill Joy and Ozalp Babaoglu led early development. The BSD project received funding from DARPA until 1988.
Operating systemAn operating system (OS) is system software that manages computer hardware and software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, peripherals, and other resources.
SoftwareSoftware (SW) consists of computer programs that instruct the execution of a computer. Software also includes design documents and specifications. The history of software is closely tied to the development of digital computers in the mid-20th century. Early programs were written in the machine language specific to the hardware.
Richard StallmanAmerican activist and programmer (born 1953)Richard Matthew Stallman ( ; born March 16, 1953), also known by his initials rms, is an American free software movement activist and programmer. He campaigns for software to be distributed in such a manner that its users have the freedom to use, study, distribute, and modify that software. Software which ensures these freedoms is termed free software.
Source CodeSource Code is a 2011 science fictionaction thriller film directed by Duncan Jones and written by Ben Ripley. It stars Jake Gyllenhaal as a US Army officer who is sent into an eight-minute virtual re-creation of a real-life train explosion, and tasked with determining the identity of the terrorist who bombed it. Michelle Monaghan, Vera Farmiga, and Jeffrey Wright play supporting roles.
Free-software licenseA free-software license is a notice that grants the recipient of a piece of software extensive rights to modify and redistribute that software. These actions are usually prohibited by copyright law, but the rights-holder (usually the author) of a piece of software can remove these restrictions by accompanying the software with a software license which grants the recipient these rights.
LibertyLiberty is the state of being free within society from restrictions imposed by authority on one's way of life, behavior, or political views. The concept of liberty can vary depending on perspective and context.Hacker cultureThe hacker culture is a subculture of individuals who enjoy—often in collective effort—the intellectual challenge of creatively overcoming the limitations of software systems or electronic hardware (mostly digital electronics), to achieve novel and clever outcomes. The act of engaging in activities (such as programming or other media) in a spirit of playfulness and exploration is termed hacking.
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