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[[File:TC-dbl.PNG|thumb|231x231px|Foobar being used to show [[Transclusion]]]]
{{Use dmy dates|date=February 2020|cs1-dates=y}}
The terms '''foobar''' ({{IPAc-en|ˈ|f|uː|b|ɑr}}), '''foo''', '''bar''', '''baz, qux, quux''',<ref>{{Cite web |editor-last=[[Eric S. Raymond]] |title=The on-line hacker Jargon File, version 4.4.8. metasyntactic variable |url=http://www.catb.org/jargon/html/M/metasyntactic-variable.html |access-date=2024-05-30 |website=[[Jargon File]]}}</ref> and others are used as [[metasyntactic variable]]s and [[placeholder name]]s in [[computer programming]] or computer-related.. documentation.<ref name="rfc3092">{{IETF RFC|3092}} - Etymology of "Foo"</ref> They have been used to name entities such as [[Variable (computer science)|variable]]s, [[Function (computer science)|functions]], and [[command (computing)|command]]s whose exact identity is unimportant and serve only to demonstrate a concept.
The style guide for [[Google]] developer documentation recommends against using them as example project names because they are unclear and can cause confusion.<ref name="Google">{{cite web |title=Example domains and names {{!}} Google developer documentation style guide |url=https://developers.google.com/style/examples#example-project-names |website=Google for Developers |access-date=26 June 2023 |language=en |date=2023-06-23 |quote=Ensure that the name is applicable to the user's environment. Don't use unclear terms like foo, bar, and baz.}}</ref>