Similar to 国際天文学連合による惑星の定義

Activity-regulated cytoskeleton-associated protein

ARJ

ArtRave: The Artpop Ball

Aru

ASA physical status classification system

Ashes and Snow

Template:Astrodynamics

AST/ALT ratio

AT Protocol

ATM (disambiguation)

ATP synthase

Template:Audio formats

Autism Network International

AV1

AVAir Flight 3378

Audio and video interfaces and connectors

AXIN1

AXIN2

Axiom (computer algebra system)

AXL receptor tyrosine kinase

Azure Linux