Placeholder names

thumb|In a 1965 essay, Reyner Banham describes the cordless electric razor as an example of "a gizmo, a gadget, a gimmick".

placeholder name for an anonymous or unknown person

placeholder name that was adopted by the World Health Organization (WHO) in February 2018 on a shortlist of blueprint priority diseases to represent a hypothetical, unknown pathogen that could cause a future epidemic

pseudonym used for film directors who do not wish to be credited in a movie production

characters used in cryptography and science literature

The name example is reserved by the Internet Engineering Task Force (IETF) as a domain name that may not be installed as a top-level domain in the Domain Name System (DNS) of the Internet.

The domain names example.com, example.net, example.org, and example.edu are second-level domain names in the Domain Name System of the Internet. They are reserved by the Internet Assigned Numbers Authority (IANA) at the direction of the Internet (IETF) as special-use domain names for documentation purposes. The domain names are used widely in books, tutorials, sample network configurations, and generally as examples for the use of domain names. The Internet Corporation for Assigned Names and Numbers (ICANN) operates websites for these domains with content that reflects their purpose.

Unobtainium (or unobtanium) is a term used in fiction, engineering, and common situations for a material ideal for a particular application but impractically difficult or impossible to obtain. Unobtainium originally referred to materials that do not exist at all, but can also be used to describe real materials that are unavailable due to extreme rarity or cost. It can also be used to refer to a device rather than a material.

stock character; youthful but one-dimensional character with overly idealized and hackneyed mannerisms, often considered a stand-in for the author

name substituted for an unknown name

Korean-language novel by Heo Gyun about the folk-hero figure Hong Gildong, written in the late 16th or early 17th century

nickname for a British Soldier, especially used during World War I

Ruritania is a fictional country, originally located in Central Europe as a setting for a trilogy of novels by Anthony Hope, beginning with The Prisoner of Zenda (1894). Nowadays, the term connotes a quaint minor European country or is used as a placeholder name for an unspecified country in academic discussions. The first known use of the demonym Ruritanian was in 1896.

national personification of Norwegians

telephone number prefix

a roughly average person, in a national context

terms expressing unspecified and made up numbers

national personification of the Philippines

joke organization

placeholder name in Roman law