Editing List of inventors (section)

===A===
* [[Vitaly Abalakov]] (1906–1986), Russia – [[Spring-loaded camming device|camming devices]], [[Abalakov thread]] (or V-thread), gearless ice climbing anchor
* [[Ernst Abbe|Ernst Karl Abbe]] (1840–1905), Germany – [[Condenser (microscope)]], [[Apochromat|apochromatic lens]], [[refractometer]]
* [[Hovannes Adamian]] (1879–1932), [[USSR]]/[[Russia]]/[[Armenia]] – tricolor principle of the [[color television]]
* [[Samuel W. Alderson]] (1914–2005), U.S. – [[crash test dummy]]
* [[Alexandre Alexeieff]] (1901–1982), Russia/France – [[Pinscreen]] animation (with his wife [[Claire Parker]])
* [[Rostislav Alexeyev]] (1916–1980), Russia/USSR – [[Ekranoplan]]
* [[Randi Altschul]] (born 1960), U.S. – Disposable [[cellphone]]
* [[Abram Alikhanov]] (1904–1970), Armenia/USSR – [[Soviet atomic bomb]], [[nuclear reactor]]
* [[Bruce Ames]] (1928-2024), U.S. – [[Ames test]] (Cell biology)
* [[Giovanni Battista Amici]] (1786–1863), Italy – [[Dipleidoscope]], [[Amici prism]]
* [[Ruth Amos]] (born 1989), UK – StairSteady
* [[Mary Anderson (inventor)|Mary Anderson]] (1866–1953), U.S. – [[windshield wiper]] blade
* [[Momofuku Ando]] (1910–2007), Japan – [[Instant noodles]]
* [[Hal Anger]] (1920–2005), U.S. – [[Well counter]] (radioactivity measurements), [[gamma camera]]
* [[Anders Knutsson Ångström]] (1888–1981), Sweden – [[Pyranometer]]
* [[Ottomar Anschütz]] (1846–1907), Germany – [[Focal-plane shutter|single-curtain focal-plane shutter]], [[electrotachyscope]]
* [[Hermann Anschütz-Kaempfe]] (1872–1931), Germany – [[Gyrocompass]]
* [[Virginia Apgar]] (1909–1974), U.S. – [[Apgar score]] (for newborn babies)
* [[Nicolas Appert]] (1749–1841), France – [[canning]] ([[food preservation]]) using glass bottles, see also [[Peter Durand]]
* [[Archimedes]] (c. 287–212 BC), Greece – [[Archimedes' screw]]
* [[Guido of Arezzo]] (c. 991–c. 1033), Italy – [[Guidonian notation]], see [[musical notation]] and also [[staff (music)]]
* [[Ami Argand]] (1750–1803), France – [[Argand lamp]]
* [[William George Armstrong]] (1810–1900), UK – [[hydraulic accumulator]]
* [[Neil Arnott]] (1788–1874), UK – [[waterbed]]
* [[Emil Artin]] (1889–1962), Armenia/Austria/Germany – modern [[abstract algebra]]
* [[Joseph Aspdin]] (1788–1855), UK – [[Portland cement]]
* [[John Vincent Atanasoff]] (1903–1995), Bulgaria/U.S. – electronic digital [[computer]]
* [[Marcel Audiffren]], France – refrigeration, patent
* [[Alexander Anim-Mensah]], Ghanaian/American – Chemical engineer, inventor