Here are some websites you might find helpful.
American Design Drafting Association/American Digital Design Association
http://www.adda.org/
The American Insititute of Architects
http://www.aia.org/
Art and Architecture Thesaurus
http://www.getty.edu/research/tools/vocabularies/aat/
Building Green.com
http://www.buildinggreen.com/
The International Archive of Women in Architecture
http://spec.lib.vt.edu/IAWA/
National Register of Historic Places
https://www.nps.gov/subjects/nationalregister/index.htm
National Trust for Historic Preservation
http://www.preservationnation.org/
Society of Architectural Historians
http://www.sah.org/
The World Wide Web Virtual Library:CAD
http://www.caddprimer.com/library/
SketchUp
Revit
https://www.autodesk.com/products/revit/overview?term=1-YEAR&tab=subscription
