Abbreviations/Acronyms: A

absolute (kelvin degrees), absorption, acoustic, alpha particle, analog, anode, ampere, amplitude, area, atomic, atomic mass, Helmholtz free energy, mass number, nucleon number

analog to analog, anti-aliasing (AA optical filter e.g. low pass filter), approximate absolute temperature, atomic absorption

American Astronomical Society

American Chemical Society

AC thin film electroluminescent display devices

automatic data transmission; anthradithiophene

accessible emission limit

Auger electron spectroscopy; atomic emission spectrometry

atomic force microscope

atomic fluorescence spectroscopy

American Institute of Chemical Engineers

atomic layer deposition

atomic layer epitaxy

active-matrix organic light-emitting diode

atomic mass unit

atmospheric pressure chemical vapor deposition

application programming interface

automatic picture transmission

Abbe refractometer; acoustic radiometer; acoustic resonance; active region; alpha ray; amplitude ratio; antireflective; aperture ratio; applied research; argon; aspect ratio; atomic reactor; augmented reality

antiradiation missile

amplified spontaneous emission

atomic time

automatic tracking laser illumination system

angstrom unit; astronomical unit

atomic vapor laser isotope separation