FreeBSD ndeye yemahara uye yakavhurika-sosi Unix-senge yekushandisa system yakaburuka kubva kuBerkeley Software Distribution (BSD), iyo yaive yakavakirwa paKutsvagisa Unix. Yekutanga vhezheni yeFreeBSD yakabudiswa muna 1993. Muna 2005, FreeBSD ndiyo yainyanyozivikanwa yakavhurika-source BSD operating system, inodarika zvikamu zvitatu zvezvose zvakaiswa uye zvinobvumirwa neBSD masisitimu. FreeBSD ine zvakafanana neLinux, ine misiyano mikuru miviri muhukuru uye marezenisi: FreeBSD inochengetedza hurongwa hwakazara, kureva kuti chirongwa chinoburitsa kernel, madhiraivha emidziyo, userland utilities, uye zvinyorwa, zvinopesana neLinux chete kuendesa kernel uye vatyairi, uye kuvimba nevechitatu-mapato kune system software; FreeBSD source code inowanzo buritswa pasi perezinesi reBSD inobvumirwa, kusiyana necopyleft GPL inoshandiswa neLinux. Iyo FreeBSD purojekiti inosanganisira timu yekuchengetedza inotarisira ese software inotumirwa mukugovera kwekutanga. Yakasiyana-siyana yekuwedzera yechitatu-bato application inogona kuisirwa kubva kumabhanari mapakeji uchishandisa pkg package management system kana kubva kunobva kuburikidza neFreeBSD Ports, [6] kana nekunyora manyore source code. Yakawanda yeFreeBSD's codebase yave chikamu chakakosha chemamwe masisitimu anoshanda seDarwin (hwaro hwemacOS, iOS, iPadOS, watchOS, uye tvOS), TrueNAS (yakavhurika-sosi NAS/SAN inoshanda sisitimu), uye system software yePlayStation 3 uye PlayStation 4 game consoles.