Letter a vowel,  the first letter  of the vowels, the first letter  of the  alphabet  or script Photo Source: Picasa Web Albums View License Details: Click Here The union of point A to another point A may have many meanings, commonly stands for diferetes organizations, businesses, meanings, names, etc. ... Here are some of the best known: AA or aa - Organizations and companies School of Architecture at the Architectural Association School of Architecture at the prestigious London-based  Architects' Association of Denmark (Akademisk Arkitektforening)  Albany Academy, an independent school for boys in Albany, New York  Albuquerque Academy, an independent school in Albuquerque, New Mexico  Alcoa, a U.S. company with the aluminum producer's stock ticker symbol AA  Alcoholics Anonymous, a worldwide community of people recovering from alcoholism Aligned Assets, a software company in the UK specializing ...