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Attempted assassination of Ronald Reagan
Attempted assassination of Ronald Reagan: on March 30, 1981, John Hinckley Jr. shot President Reagan outside the Washington Hilton to impress Jodie Foster; Reagan survived, Hinckley was found insane, and James Brady's paralysis led to the Brady Bill.
Attempted assassination of Theodore Roosevelt
John Flammang Schrank (1876-1943) shot Theodore Roosevelt in the chest on October 14, 1912, outside Milwaukee's Gilpatrick Hotel during the Bull Moose campaign; a glasses case and 50-page speech slowed the bullet, and Roosevelt delivered his speech.
Attempted murder
Attempted murder, also known as attempt to murder, is an inchoate offense where someone with intent to kill takes a substantial step toward the killing, though the victim does not die.
Attempts to arrest Ronald dela Rosa
Attempts to arrest Ronald dela Rosa (Bato), Philippine senator and ex-PNP chief, under the ICC warrant of November 2025 charging drug-war murders; Senate standoff, Supreme Court denial, still at large in 2026.
Attempts to claim Bir Tawil as a sovereign state
Attempts to claim Bir Tawil, also styled Kingdom of North Sudan or Principality of Bir Tawil: private micronation declarations over the 2,060 km² Egypt-Sudan desert claimed by neither state; all lack recognition because only states can acquire terra nullius.
Attempts to overturn the 2020 United States presidential election
Attempts to overturn the 2020 US presidential election: Donald Trump and allies' 62 lawsuits, fake elector scheme, pressure on officials, and January 6 effort to reverse Biden's win, all rejected by courts and audits.
Attention
Attention: selective direction of mental resources, studied in psychology, neuroscience, philosophy, economics, and machine learning. Key facts: James 1890, Posner's alerting-orienting-executive networks, ANT, capacity limits, and the debate over whether 'attention' is one construct.
Attention network task
The attention network task (ANT) is a computerized reaction-time task measuring the efficiency of the alerting, orienting, and executive control attention networks, reported by Jin Fan and colleagues in 2002.
Attention network test
The Attention Network Test (ANT) is a computerized behavioral task measuring the alerting, orienting, and executive control attention networks from reaction times, introduced by Jin Fan and colleagues in 2002.
Attention seeking
Attention seeking: behavior designed to attract notice and admiration, per DSM-5; a personality trait or symptom of histrionic and narcissistic disorders, reframed in child welfare as attachment-needing and now studied as attention capital on social media.
Attention span
Attention span, studied as sustained attention or vigilance, is how long focus holds on one task. Covers the debunked 8-second Microsoft claim, Gloria Mark's 47-second screen figure, and mixed media multitasking research.
Attentive (Braga, Portugal)
Attentive, legally Attentive, Lda, was a Braga, Portugal software startup founded in 2015 that built an augmented sales assistant for sales teams, raising a €1.1 million seed in 2019 before dissolving in 2020.
Attenu
Attenu, also known as Attanu, was a Hurrian diviner and chief priest in the Late Bronze Age kingdom of Ugarit, known as the teacher of the scribe Ilimilku.
Attest (company)
Attest is a London-based consumer research platform founded in 2015 by Jeremy King, letting brands run no-code surveys against an aggregated panel of over 100 million consumers.
Ättestupa
Ättestupa (ættestup, Ætternisstapi) is the Nordic legend of cliffs from which elderly people jumped or were thrown in pagan antiquity; historians regard it as a myth spread from the 1664 Verelius translation of Gautreks saga, with no written or archaeological evidence.
Atthakatha
Atthakatha (Aṭṭhakathā), meaning "exposition of the sense," is the Theravada commentarial literature on the Pali Tipitaka, largely composed in Sri Lanka in the fifth and sixth centuries CE by Buddhaghosa and other commentators.
Attic Greek
Attic Greek (ἡ Ἀττικὴ διάλεκτος) is the dialect of Attica and Classical Athenian literature, an Ionic-Attic branch dialect marked by ττ spellings and ᾱ. Its Ionicized form became the koine and the basis of Modern Greek.
Attica Correctional Facility
Attica Correctional Facility: maximum-security New York State prison in Wyoming County, opened 1931; site of the September 1971 uprising, the deadliest in U.S. prison history, with 43 deaths.
Attica Prison riot
Attica Prison riot: September 9-13, 1971 uprising at Attica Correctional Facility, New York, also called the Attica uprising; about 1,000 inmates seized the prison, took 42 hostages, and 43 people died when Governor Rockefeller ordered the retaking.
Atticus
Atticus (died 425) was bishop of Constantinople from 406 to 425. An Armenian ascetic, he ended the Johannite schism by restoring John Chrysostom's name to the public prayers.
Atticus (philosopher)
Atticus was a second-century Middle Platonist philosopher active in Athens around 178 CE, known for his uncompromising rejection of Aristotle and defense of a literal reading of Plato's Timaeus.
Attijariwafa Bank
Attijariwafa Bank is a Moroccan banking group created in 2004 through the merger of Banque Commerciale du Maroc and Wafabank; it is the fifth-largest bank in Africa by total assets.
Attila
Attila (died 453), king of the Huns 434–453, ruled an empire from the Rhine to the Dnieper, ravaged the Balkans, was checked in Gaul in 451, died suddenly in 453, and his empire collapsed at Nedao in 454.
Attila Tetik
Attila Tetik is a semiconductor executive who co-founded LSI Computer Systems in Melville, New York, in 1969 with Alvin Kaplan after developing CPU circuits for Control Data Corporation.
Attila's invasion of the Western Roman Empire
Attila's invasion of the Western Roman Empire was a two-year Hunnic campaign, 451–452, into Gaul and northern Italy, halted at the Catalaunian Plains and by diplomacy.
Attilio Fontana
Attilio Fontana, born in Varese in 1952, is an Italian Lega politician and criminal lawyer who was elected President of Lombardy in 2018 and reelected in 2023.
Attimabbe
Attimabbe (ಅತ್ತಿಮಬ್ಬೆ) was a Jain noblewoman and philanthropist of the Western Chalukya kingdom who lived at Lakkundi in Karnataka, patronized the poet Ranna, and built a Jain temple there in 1007.
Attingal Kingdom
The Attingal Kingdom (അത്തിങ്കൽ) was a small principality in Kerala, India, ruled by Ranis under the matrilineal system near Anjengo, remembered for the 1721 massacre of 140 English East India Company men.
Attingal Outrage
The Attingal Outrage (अट्टिंगल घटना) was the killing of East India Company men at Attingal, Kerala, in April 1721, followed by a six-month siege of Anjengo fort.
Attingal Ranis
The Attingal Ranis (ആറ്റിങ്ങൽ) were matrilineal princesses who held sovereign authority over Attingal in southern Kerala, most notably Umayamma Rani, until Travancore absorbed the territory in 1731.