What does A. stand for?

What does A. mean?

A	Artemis Community » Educational
A	Apron Miscellaneous » Clothes
A	Adjective Community » Educational
A	Ampere Academic & Science » Physics
A	Agilent Technologies Business » NYSE Symbols
A	Adenine Medical » Physiology
A	Alay International » Turkish
A	Anteater Medical » Veterinary
A	Alveolization Medical » Physiology
A	Anglo American Cataloguing Rule Academic & Science » Libraries
A	Ampere Academic & Science » Electronics
A	Ampere Miscellaneous » Unit Measures
A	Ampere Governmental » NASA
a.	Acre Miscellaneous » Unit Measures
A	form A (normally open) contacts Computing » Hardware
A	form A (normally open) contacts Academic & Science » Electronics
A	Apature priority autoexposure Miscellaneous » Photography
A	Anode Academic & Science » Electronics
A	Approved Business » General
A	Angstrom Governmental » NASA
A	Analog signal Governmental » NASA
A	Alpha Governmental » NASA
A	Acceleration Governmental » NASA
A	Aft Governmental » NASA
A	Analog Governmental » Military