Bill Gates's Open Letter to Hobbyists from the Homebrew Computer Club Newsletter, January 1976
An open letter is a letter that is intended to be read by a wide audience, or a letter intended for an individual, but that is nonetheless widely distributed intentionally.
Open letters usually take the form of a letter addressed to an individual but provided to the public through newspapers and other media, such as a letter to the editor or blog. Especially common are critical open letters addressed to political leaders.
Letters patent are another form of open letter in which a legal document is both mailed to a person by the government and publicized so that all are made aware of it. Open letters can also be addressed directly to a group rather than any individual.
^Kaufmann, Eric Peter (1 March 2021). Academic Freedom in Crisis: Punishment, Political Discrimination, and Self-Censorship(PDF) (Report). Center for the Study of Partisanship and Ideology. 2. Archived from the original(PDF) on 7 March 2021. Lay summary – Press Release (1 March 2021). Hard authoritarianism entails no-platforming, dismissal campaigns, social media mob attacks, open letters, and formal complaints and disciplinary action, and stems mainly from a subgroup of illiberal far-left activist staff and students. I find that only a small minority of academic staff are protagonists. Figure 1 shows support for cancellation across five surveys and five hypothetical scenarios involving controversial academics.