Blacklisting is the action of a group or authority, compiling a blacklist (or black list) of people, countries or other entities to be avoided or distrusted as not being acceptable to those making the list. If someone is on a blacklist, they are seen by a government or other organization as being one of a number of people who cannot be trusted or who have done something wrong. As a verb, blacklist can mean to put an individual or entity on such a list.
Origins of the term
After the restoration of the English monarchy brought Charles II of England to the throne in 1660, a list of regicides named those to be punished for the execution of his father. The state papers of Charles II say "If any innocent soul be found in this black list, let him not be offended at me, but consider whether some mistaken principle or interest may not have misled him to vote". In a 1676 history of the events leading up to the Restoration, James Heath (a supporter of Charles II) alleged that Parliament had passed an Act requiring the sale of estates, "And into this black list the Earl of Derby was now put, and other unfortunate Royalists".
Edward Gibbon wrote in The History of the Decline and Fall of the Roman Empire (1776) of Andronicus that "His memory was stored with a black list of the enemies and rivals, who had traduced his merit, opposed his greatness, or insulted his misfortunes".
The first published reference to blacklisting of an employee dates from 1774. This became a significant employment issue in American mining towns and company towns, where blacklisting could mean a complete loss of livelihood for workers who went on strike. The 1901 Report of the Industrial Commission stated "There was no doubt in the minds of workingmen of the existence of the blacklisting system, though it was practically impossible to obtain evidence of it." It cited a news report that in 1895 a former conductor on the Atlantic and Pacific Railroad committed suicide, having been out of work ever since a strike: "Wherever he went, the blacklist was ahead of him".
Though the National Labor Relations Act of 1935 outlawed punitive blacklists against employees who supported trade unions or criticised their employers, the practice continued in common use. The Taft-Hartley Act of 1947 made amendments which sustained blacklisting by affirming the right of employers to be anti-union, and by requiring trade union leaders to make loyalty oaths which had the same effect as the Hollywood blacklist. Since then, lawsuits for unfair dismissal have led to blacklisting being covert or informal, but it remains common.
Spanish Civil War and communists blacklisted
At least one volunteer (George Drever) in the International Brigades who went to Spain to fight Franco's fascists and who was also well known in the British Communist Party in the 1930s was informed by the police Special Branch that his failure to progress in military or career was due to his volunteering in this cause and his beliefs.
World Wars I and II
During World War I, the British government adopted a "blacklist" based on an Order in Council of 23 December 1915, prohibiting British subjects from trade with specified firms and individuals in neutral countries; the lists were published in the London Gazette.
In the summer of 1940, the SS printed a secret list called Sonderfahndungsliste G.B. ("Special Search List Great Britain") as part of Nazi Germany's preparations for invasion codenamed Operation Sea Lion – when this booklet was found after the war, it was commonly called the Black Book and described as a blacklist.
Hollywood anti-communist blacklist
The Hollywood blacklist was instituted by the House Un-American Activities Committee in 1947 to block screenwriters and other Hollywood professionals who were purported to have Communist sympathies from obtaining employment. It started by listing 151 entertainment industry professionals and lasted until 1960 when it was effectively broken by the acknowledgement that blacklisted professionals had been working under assumed names for many years.
Blacklisting by multiple providers is a systematic act by doctors to deny care to a certain patient or patients. It is done in various ways for various reasons; blacklisting is not new. In 1907 the Transvaal Medical Union in South Africa blacklisted patients if they could not pay cash in advance. In this case, there was a physical list kept by the community of physicians. A physical list is not necessary to blacklist patients but the effect is the same.
The United States Department of Health & Human Services (HHS) found that reviewed hospitals did not generate incident reports for 93% of adverse events. The 7% of the time when they did generate reports, the information was inaccurate 63% of the time. Problems causing harm to patients were reported accurately only 2% of the time. If blacklisting is multiple providers systematically denying care to a certain patient or patients, in this case patients with iatrogenic injuries, it is reasonable to define it as blacklisting when 98% of the time the first group, treatment providers, singles out members of the second group, injured patients, to prevent them from having an accurate record made of what injured them. Those patients are further injured by not having the accurate record necessary for getting care for the injuries.
Credit card merchant accounts
Companies which have a payment card merchant account terminated, and their directors, are often added to a list referred to when companies apply for an account; they are then unlikely to be granted a new account by any provider. In the US the list is called TMF/MATCH.
In computing, a blacklist is an access control system that denies entry to a specific list (or a defined range) of users, programs, or network addresses.
In June and July 2020:
- GitHub announced that it would replace many "terms that may be offensive to developers in the black community". 
- Apple Inc announced at its developer conference that it would be adopting more inclusive technical language and replacing the term blacklist with deny list and the term whitelist with allow list.
- Linux Foundation said it would use neutral language in kernel code and documentation and avoid terms such as blacklist and slave. 
- Twitter Engineering team stated their intention to move away from a number of terms, including 'blacklist' and 'whitelist'. 
- Red Hat announced that it would make open source more inclusive and avoid these and other terms. 
- ZDNet reports that the list of technology companies making such decisions "includes Twitter, GitHub, Microsoft, LinkedIn, Ansible, Red Hat, Splunk, Android, Go, MySQL, PHPUnit, Curl, OpenZFS, Rust, JP Morgan, and others." 
- "Blacklist definition and meaning". Collins English Dictionary. 7 March 2017. Retrieved 7 March 2017.
- Peter Chadlington (2005). The Real McCoy: Understanding Peculiar English. Icon. p. 43. ISBN 978-1-84046-684-3.
Philip Massinger. Dramatic Works: A new way to pay old debts. The great Duke of Florence. The unnatural combat. The bashful lover. T. Davies. p. 194.
Might write me down in the black List of those That have nor Fire, nor Spirit of their own
- Paul McFedries (August 5, 2008). The Complete Idiot's Guide to Weird Word Origins. DK Publishing. p. 14. ISBN 978-1-101-21718-4.
- Great Britain. Public Record Office (1968). Calendar of state papers, domestic series, of the reign of Charles II: preserved in the state paper department of Her Majesty's Public Record Office. Longman, Green, Longman & Roberts.
- James Heath; John Phillips (1676). A Chronicle of the Late Intestine War in the Three Kingdoms of England, Scotland and Ireland: With the Intervening Affairs of Treaties, and Other Occurrences Relating Thereunto. As Also the Several Usurpations, Forreign Wars, Differences and Interests Depending Upon It, to the Happy Restitution of Our Sacred Soveraign K. Charles II. In Four Parts, Viz. The Commons War, Democracie, Protectorate, Restitution. J. C.
- Gibbon, Edward; Milman, Henry Hart (2008-06-07). Widger, David (ed.). The History of the Decline and Fall of the Roman EmpireTable of Contents with links in the HTML file to the two Project Gutenberg editions (12 volumes). VIII.
- Robert E. Weir (2013). Workers in America: A Historical Encyclopedia. ABC-CLIO. pp. 71–72. ISBN 978-1-59884-718-5.
- United States Industrial Commission; Balthasar Henry Meyer; Roswell Cheney McCrea (1901). Report of the Industrial Commission on Transportation, including testimony, review and topical digest of evidence, and special reports on railway legislation. U.S. Government Printing Office.
- The Encyclopedia Americana (1920), Blacklist
- Philip Gooden; Peter Lewis (September 25, 2014). The Word at War: World War Two in 100 Phrases. Bloomsbury Publishing. p. 22. ISBN 978-1-4729-0490-4.
- Wilkerson, William (1946-07-29). "A Vote For Joe Stalin". The Hollywood Reporter. p. 1.
- Baum, Gary; Daniel Miller (November 19, 2012). "Blacklist: THR Addresses Role After 65 Years". Hollywood Reporter. Retrieved 20 November 2012.
- Deacon, Harriet; Phillips, Howard; van Heyningen, Elizabeth, eds. (2004). The Cape Doctor in the Nineteenth Century: A Social History (Clio Medica, 74). Editions Rodipi B.V. ISBN 9042010649.
- 2% ≈ 7% × (100% − 63%)
- Ashcraft, Amy; Dorrill, Ruth Ann (March 2010). "Adverse events in hospitals: Methods for identifying events" (PDF). oig.hhs.gov. HHS. Retrieved March 26, 2016.
- 98% ≈ 93% + (7% × 63%)
- "GitHub to replace "master" with alternative term to avoid slavery references". www.zdnet.com. Retrieved 2020-08-14.
- "Apple banishes 'blacklist' and 'master branch' in push for inclusive language". www.msn.com. Retrieved 2020-07-20.
- "pull request for inclusive-terminology". git.kernel.org. Retrieved 2020-08-14.
- "We're starting with a set of words we want to move away from using in favor of more inclusive language". twitter.com. Retrieved 2020-08-14.
- "Making open source more inclusive by eradicating problematic language". www.redhat.com. Retrieved 2020-08-14.
- "Linux team approves new terminology, bans terms like 'blacklist' and 'slave'". www.zdnet.com. Retrieved 2020-08-14.
- Lorence, James J. (1999). The Suppression of Salt of the Earth: How Hollywood, Big Labor, and Politicians Blacklisted a Movie in Cold War America. University of New Mexico Press. ISBN 0-8263-2027-9.
|Look up blacklist in Wiktionary, the free dictionary.|
|Wikisource has the text of the 1920 Encyclopedia Americana article Blacklisting.|