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NetBSD is an open-source, Unix-like operating system that descends from Berkeley Software Distribution (BSD), a Research Unix derivative developed at the University of California, Berkeley. It was the second open-source BSD descendant formally released after it forked from the 386BSD〔(【引用サイトリンク】title=Open Sources: Voices from the Open Source Revolution )〕 branch of the BSD source-code〔(【引用サイトリンク】title=About NetBSD )〕 repository. It continues to be actively developed and is available for many platforms, including large-scale server systems, desktop systems, and handheld devices,〔 and is often used in embedded systems.〔(【引用サイトリンク】title=Get to know NetBSD: An operating system that travels )〕〔 pp. 291–292.〕 The NetBSD project focuses on code clarity, careful design, and portability across many computer architectures. NetBSD's source code is openly available and very permissively licensed. == History == NetBSD was originally derived from the 4.3BSD release of the Berkeley Software Distribution from the Computer Systems Research Group of the University of California, Berkeley, via their Net/2 source code release and the 386BSD project.〔 The NetBSD project began as a result of frustration within the 386BSD developer community with the pace and direction of the operating system's development. The four founders of the NetBSD project, Chris Demetriou, Theo de Raadt, Adam Glass, and Charles Hannum, felt that a more open development model would benefit the project: one centered on portable, clean, correct code. They aimed to produce a unified, multi-platform, production-quality, BSD-based operating system. The name "NetBSD" was suggested by de Raadt, based on the importance and growth of networks such as the Internet at that time, and the distributed, collaborative nature of its development. The NetBSD source code repository was established on 21 March 1993 and the first official release, NetBSD 0.8, was made in April, 1993. This was derived from 386BSD 0.1 plus the version 0.2.2 unofficial patchkit, with several programs from the Net/2 release missing from 386BSD re-integrated, and various other improvements.〔 The first multi-platform release, NetBSD 1.0, was made in October 1994. Also in 1994, for disputed reasons, one of the founders, Theo de Raadt, was removed from the project. He later founded a new project, OpenBSD, from a forked version of NetBSD 1.0 near the end of 1995. In 1998, NetBSD 1.3 introduced the pkgsrc packages collection. Until 2004, NetBSD 1.x releases were made at roughly annual intervals, with minor "patch" releases in between. From release 2.0 onwards, NetBSD uses semantic versioning, and each major NetBSD release corresponds to an incremented major version number, i.e. the major releases following 2.0 are 3.0, 4.0 and so on. The previous minor releases are now divided into two categories: ''x.y'' "stable" maintenance releases and ''x.y.z'' releases containing only security and critical fixes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「NetBSD」の詳細全文を読む スポンサード リンク
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