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===NetBSD===
[[NetBSD]] aims to provide a freely redistributable operating system that professionals, hobbyists, and researchers can use in any manner they wish. The main focus is [[software portability|portability]], through the use of clear distinctions between machine-dependent and [[cross-platform software | machine-independent]] code. It runs on a wide variety of [[32-bit]] and [[64-bit]] [[Central processing unit | CPU]] [[Instruction set architecture processor| architectures]] and hardware platforms, and is intended to interoperate well with other operating systems.
NetBSD places emphasis on [[Software verification and validation#Software validation|correct design]], well-written code, stability, and efficiency, where practical, close compliance with [[open API]] and [[open protocol | protocol standards]] is also aimed for. NetBSDA haspowerful very[[Internet lowprotocol hardwaresuite requirements| TCP/IP stack]], combined with a small [[application footprint | footprint]],<ref>{{cite web |url=https://machaddr.substack.com/p/netbsd-the-portable-lightweight-and is|title=NetBSD: The Portable, Lightweight, and Robust Unix-Like OS | author=André Machado | date=4 November 2024}}</ref> make NetBSD well suited to be deployed[[embedded insystem | embedded]] in [[Network service | networking applications]],<ref>{{cite web |url=https://yazzy.org/docs/NetBSD/Embedding_NetBSD.pdf |title=Embedding the NetBSD Operating author| author=Wasabi Systems Inc |access-date=8 February 2025}}</ref> as well as to revive vintage hardware.<ref>{{cite web |url=https://www.theregister.com/2022/08/10/netbsd_93/ |title=NetBSD 9.3: A 2022 OS that can run on late-1980s hardware | author=The Register |date=10 August 2022 |access-date=8 February 2025}}</ref>
In June 2008, the NetBSD Foundation moved to a two [[BSD_licenses#2-clause_license_("Simplified_BSD_License"_or_"FreeBSD_License") | 2-clause BSD license ]], citing changes at UCB and industry applicability.<ref>{{cite web | date = 2006-01-08 | url = http://www.netbsd.org/Misc/about.html | title = About the NetBSD Project – What is the NetBSD project? | publisher = The NetBSD Foundation, Inc. | access-date = 2006-04-22}}</ref> ▼The NetBSD cross-compiling framework (also known as "build.sh"<ref>{{cite web |url=https://www.netbsd.org/docs/guide/en/chap-build.html |title=Chapter 31. Crosscompiling NetBSD with build.sh |work=The NetBSD Guide |author=The NetBSD Foundation |date=10 January 2010 |access-date=15 January 2010}}</ref>) lets a developer build a complete NetBSD system for an architecture from a more powerful system of different architecture ([[cross-compiling]]), including on a different operating system.
SeveralProjects securityspawned features are available inby NetBSD,<ref>{{cite web|url=http://netbsd.gw.com/cgi-bin/man-cgi?security+8+NetBSD-current|title=NetBSDinclude security(8) manual page}}</ref> including IPsec, a homegrown firewall ([[NPF (firewall)|NPF]]), a[[Rump filekernel integrity| systemRump kernels ]], ([[Veriexecbusdma]]), a[[pkgsrc]] kerneland authorizationNVMM. framework (kauth),<ref>{{cite web |url=https://manblog.netbsd.org/kauth.9tnf/entry/from_zero_to_nvmm |title=kauth(9)From |work=NetBSDZero Manualto PagesNVMM| |date=10 August 20092019-04-09 |access-date=8 February 2025-01-06}}</ref> a built-in kernel debugger and a number of exploit mitigations like W^X and ASLR.
▲In June 2008, the NetBSD Foundation moved to a two-clause BSD license, citing changes at UCB and industry applicability.<ref>{{cite web | date = 2006-01-08 | url = http://www.netbsd.org/Misc/about.html | title = About the NetBSD Project – What is the NetBSD project? | publisher = The NetBSD Foundation, Inc. | access-date = 2006-04-22}}</ref>
Projects spawned by NetBSD include [[NPF (firewall)|NPF]], [[Rump kernel | Rump kernels ]], [[pkgsrc]] and NVMM. <ref>{{cite web |url=https://blog.netbsd.org/tnf/entry/from_zero_to_nvmm |title=From Zero to NVMM| date=2019-04-09 |access-date=2025-01-06}}</ref>
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