AATA online - http://www.aata.getty.edu/NPS/

Academic search premier - 
http://galfe1.gsu.edu/cgi-bin/homepage.cgi?link=zbap&style=&_
id=4471680a-1282740476-2798&_cc=1 or http://search.ebscohost.com/ 

Accessible Archives full-text databases -  
http://www.accessible.com/accessible/ 

ACM Digital Library - http://portal.acm.org/dl.cfm

Ad*access - http://library.duke.edu/digitalcollections/adaccess/

Advanced polymers abstracts - 
http://www.csa.com/factsheets/ema-polymers-set-c.php

Aerospace & high technology database - 
http://www.csa.com/factsheets/aerospace-set-c.php

African-American Poetry (1750-1900) - 
http://collections.chadwyck.com/marketing/home_aap.jsp

AGRICOLA - http://agricola.nal.usda.gov/

Agricultural & environmental biotechnology abstracts - 
http://www.csa.com/factsheets/agricultural-set-c.php

AIDS & cancer research - 
http://galfe1.gsu.edu/cgi-bin/homepage.cgi?link=zcac&style=
&_id=4471680a-1282741051-7594

ALB1876, American libraries before 1876 -  
http://www.princeton.edu/~davpro/databases/index.html 

Algology, mycology & protozoology abstracts - 
http://www.csa.com/factsheets/microbiology-c-set-c.php 

Aluminium industry abstracts - http://www.csa.com/factsheets/aia-set-c.php 

America's newspapers - http://nclive.lib.unc.edu/authhome.phtml?rsrc=216

America, history and life - http://etextb.ohiolink.edu/help/ahnl.html 

American broadsides and ephemera. Series I - 
http://www.newsbank.com/readex/product.cfm?product=2  

American FactFinder - http://factfinder.census.gov/home/saff/main.html?_lang=en 

American national biography - http://www.anb.org/biooftheday.html

American poetry (1600-1900) - http://nclive.lib.unc.edu/authhome.phtml?rsrc=102

American slavery - http://library.uncg.edu/slavery/ 

AMICA library - http://www.davidrumsey.com/AMICA/ 

Amphibian species of the world - 
http://research.amnh.org/herpetology/amphibia/index.php 

Animal behavior abstracts - 
http://www.csa.com/factsheets/animal-behavior-set-c.php

Animal health and production compendium - 
http://www.cabicompendium.org/ahpc/home.asp

Antbase.org -  http://antbase.org/ 

Anthropological index online - 
http://aio.anthropology.org.uk/cgi-bin/uncgi/search_bib_ai/anthind 

Anthropological literature - http://hcl.harvard.edu/libraries/tozzer/anthrolit.html 

AnthroSource - http://www.anthrosource.net/

Aqua KE government documents library - http://govdocs.aquake.org/ 

Aquatic sciences & fisheries abstracts. Part 1, Biological sciences
& living resources - http://www.csa.com/factsheets/aquclust-set-c.php

Aquatic sciences and fisheries abstracts (ASFA) - 
http://www.csa.com/factsheets/aquclust-set-c.php

Aquatic sciences and fisheries abstracts. Part 2, Ocean technology, policy
and non-living resources - http://library.dialog.com/bluesheets/html/bl0044.html

Aquatic sciences and fisheries abstracts. Part 3, Aquatic pollution
and environmental quality - http://www.csa.com/factsheets/aquclust-set-c.php 

ArchivesUSA - 
http://galfe1.gsu.edu/cgi-bin/homepage.cgi?link=zhau&style=
&_id=4471680a-1292742602-4967&_cc=1

Art index - http://www.artindex.com/home/index.asp

Art index retrospective -  http://vnweb.hwwilsonweb.com/hww/
advancedsearch/advanced_search.jhtml;hwwilsonid=KPYCM23BER3NRQA
3DIMCFGOADUNGIIV0?prod=ARTFT#formTop 

Arts & humanities citation index - http://scientific.thomson.com/products/ahci/

ARTstor - http://www.artstor.org/index.shtml

arXiv.org e-Print archive - http://arXiv.org 

ASABE technical library - http://asae.frymulti.com/

ASEE Annual conference proceedings - 
http://www.asee.org/conferences/v2Search.cfm

ASFA marine biotechnology abstracts - 
http://www.csa.com/factsheets/marine-set-c.php

ATLA religion database - http://www.ovid.com/site/catalog/DataBase/18.jsp

Atlas of Florida vascular plants - http://www.plantatlas.usf.edu/

Avery index to architectural periodicals - 
http://www.csa.com/factsheets/avery-set-c.php