AODP—Adaptive optics development program

APEX—Atacama Pathfinder Experiment, 12-m telescope at ALMA site run by Max-Planck-Institut für Radioastronomie, ESO, and Onsala Space Observatory

ARO—Arizona Radio Observatory

AS—Academia Sinica, Taiwan

ASIAA—Academica Sinica Institute of Astronomy and Astrophysics

ASKAP—Australian SKA Pathfinder

AST—The Division of Astronomical Sciences in the MPS Directorate at NSF

ASTE—Atacama Submillimeter Telescope Experiment, 10-m telescope at ALMA site run by the National Astronomical Observatory of Japan (NAOJ) in collaboration with universities in Japan and Chile

ATA—Allen Telescope Array

ATA-42—Current version of ATA with 42 antennas

ATA-256—Allen Telescope Array with 256 antennas

ATI—Advanced Technologies and Instrumentation program at NSF-AST

ATIC—Advanced Thin Ionization Calorimeter

ATST—Advanced Technology Solar Telescope

AUI—Associated Universities, Inc.

AURA—Association of Universities for Research in Astronomy

BAO—Baryon acoustic oscillation

BBH—Binary black hole

BBN—Big bang nucleosynthesis

BESS—Balloon-borne Experiment with Superconducting Spectrometer

BIMA—Berkeley-Illinois-Maryland Association

BLISS—Background-Limited Infrared-Submillimeter Spectrograph

BSRBS—NRAO’s Green Bank Solar Radio Burst Spectrometer

CALISTO—Cryogenic Aperture Large Infrared Space Telescope Observatory

CARA—Center for Atmospheric Research in Antarctica

CARMA—Combined Array for Research in Millimeter-wave Astronomy

CASA—Common Astronomy Software Applications, a data reduction package led by NRAO for EVLA and ALMA use

CATE—Cost appraisal and technical evaluation

CCAT—Formerly the Cornell-Caltech Atacama Telescope

CCD—Charge-coupled device

CDMS—Cryogenic Dark Matter Search

CFP—Cosmology and Fundamental Physics, an Astro2010 Science Frontiers Panel

CGM—Circumgalactic medium