ASCAP (American Society of Composers, Authors and Publishers): http://www.ascap.com/
ASCII (American standard code for information interchange) Table: http://www.devlist.com/
ASIST (American Society for Information Science & Technology): http://www.asis.org/
Association française pour la lecture: http://www.lecture.org/
Association of American Publishers (AAP): http://www.publishers.org/
AT&T: http://www.att.com/
Athena: http://un2sg4.unige.ch/athena/
Athena Literature Resources: http://un2sg4.unige.ch/athena/html/booksite.html
Athena: Mineralogy: http://un2sg4.unige.ch/athena/mineral/mineral.html
Athena: Swiss authors and texts: http://un2sg4.unige.ch/athena/html/swis_txt.html