| at.no. | Atomic Number [engl.] |
| ANO | Atomic Natural Orbital |
| APT | Atomic Polar Tensor |
| LAO | Localized Atomic Orbital |
| ETAA | ElectroThermal Atomic Absorption |
| EAN | Effective Atomic Number |
| AT | Atomic Time [engl.] |
| A.W. | Atomic Weight [engl.] Atomgewicht |
| ZAA | Zeeman Atomic Absorption |
| AP | Atomic Power [engl.] Kernernergie |
| EURATOM | EURopean ATOMic energy community |
| FAAS | Flame Atomic Absorption Spectrometry |
| FAES | Flame Atomic Emission Spectroscopy |
| FAS | Flame Atomic Emission Spectroscopy |
| GFAA | Graphite Furnace Atomic Absorption |
| HGAA | Hydride Generation followed by Atomic Absorption |
| IAEA | International Atomic Energy Agency Internationale Atomenergie Organisation [IAEO] |
| JCAE | Joint Committee on Atomic Energy |
| LAF | Laser Atomic Fluorescence spectroscopy |
| LCAO | Linear Combination of Atomic Orbitals |
| MAES | Multielement Atomic Emission Spectrometry |
| SCAN | Spherical Cloud Atomic Orbital |
| U | unified atomic mass unit |
| ZAAS | Zeeman Atomic Absorption Spectroscopy |
| LCAS | Linear Combination of Atomic Substrate |
| A.D.E. | Atomic Energy Authority [engl.] Britische Atombehörde |
| a.m.u. | atomic mass unit [engl.] Atom-Masseneinheit |
| A.W.U. | Atomic Weight Unit [engl.] Atomgewichts-Einheit |
| AEC | Atomic Energy Commission [engl.] Amerikanische Behörde von 1946 bis 1975 |
| AFM | Atomic Force Microscopy [engl.] |
| AFS | Atomic Fluorescence Spectroscopy [engl.] |
| AMN | Atomic Mass Number [engl.] Atom-Massenzahl |
| AMU | Atomic Mass Unit [engl.] Atommasseneinheit |
| APM | Atomic Parameter Matrix [engl.] |
| ARS | Atomic Resolution Storage [engl.] |
| APS | Atomic Power Station [engl.] Atomkraftwerk |
| FAA | Furnace Atomic Absorption [alt.:GFAA] |
| ASA | Atomic Sphere Approximation [engl.] |
| ARM | Atomic Resolution Microscope [engl.] |
| CVAA | Cold Vapor Atomic Absorption spectroscopy |
| UKAEA | United Kingdom Atomic Energy Authority Culham, http://www.ukaea.org.uk |
| ABBC | Atomic Bomb Casualty Commission [engl.] |
| ABCD | Atomic, Biological and Chemical Defense [engl.] Verteidigung gegen ABC-Waffen |
| BARC | Barath Atomic Research Center [engl.] Atomtestzentrum des indischen Rüstungskonzerns |
| GAPT | Generalized Atomic Polar Tensor [Methode] |
| ARAS | Atomic Resonance Absorption Spectrophotometry [engl.] |
| APNO | Atomic Pair Natural Orbital [engl.] |
| CFAES | Carbon Furnace Atomic Emission Spectrometry |
| AOETF | Atomic Orbital Electron Translation Factor [engl.] |