N'afọ 1977, Berkeley Software Distribution (BSD) bụ nke Computer Systems Research Group (CSRG) nke UC Berkeley mepụtara, dabere na mbipụta nke isii nke Unix site na AT&T. Ebe ọ bụ na BSD nwere koodu Unix nke AT&T nwere, AT&T gbara akwụkwọ (USL v. BSDi) na mbido 1990s megide Mahadum California. Nke a belatara mmepe na nnabata nke BSD. Na 1983, Richard Stallman malitere oru ngo GNU na ebumnuche nke ịmepụta sistemụ arụmọrụ UNIX n'efu. Dịka akụkụ nke ọrụ a, o dere GNU General Public License (GPL). Ka ọ na-erule mbido 1990s, enwere sọftụwia zuru ezu iji mepụta sistemụ arụmọrụ zuru oke. Agbanyeghị, kernel GNU, akpọrọ Hurd, enweghị ike ịdọta mbọ zuru oke, na-ahapụ mmepe GNU. Na 1985, Intel wepụtara 80386, nke mbụ nwere njikwa microprocessor nke AT&T nwere.
ihe fọrọ nke nta ka ọ bụrụ ngwanrọ zuru ezu iji mepụta usoro sistemụ zuru ezu