USA.gov's A-Z Index of U.S. Government Departments and Agencies. Government departments, agencies, bureaus, commissions, committees, and offices.
USA.gov's Government Departments and Agencies
USA.gov's Publications.usa.gov
United States Government Manual (online search):
http://www.usgovernmentmanual.gov/
U.S. Government Org Chart (Oct 2011)
Directory of Federal Historical Offices and Activities (Society for History in the Federal Government): provides information on offices in all branches of government that perform history-related work
Publications: http://publications.usa.gov/USAPubs.php
Publications of the U.S. Government (National Archives Record Group 287)
https://www.archives.gov/research/guide-fed-records/groups/287.html
Federal agency publications acquisitions (Libguide collection by Vicki Tate):
http://libguides.southalabama.edu/c.php?g=171649&p=1132359
Cross-agency Portals: http://m.usa.gov/usa/Topics/Cross_Agency_Portals
United States Government Manual, 1995/96 - 2011:
U.S. Government Manual 2011
U.S. Government Manual 2009/10 (pdf)
U.S. Government Manual 2009/10 (in digital library)
http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=GOVMAN
Official Congressional Directory, 2011-2012, 112th Congress (Fdsys, Dec 2011, 1253 p., S. Pub 112-2) - print version
Sourcebook of United States Executive Agencies (Second Edition, 2018): https://www.acus.gov/publication/sourcebook-united-states-executive-agencies-second-edition (PDF, 188 p.)
USA.gov: http://www.usa.gov
USA.gov A-Z Agency Index:
http://www.usa.gov/Agencies/Federal/All_Agencies/index.shtml
USA.gov RSS feeds: http://www.usa.gov/rss/
Federal Government Mobile Apps Directory: https://www.usa.gov/mobile-apps (about)
Directorio Federal de Aplicaciones (Apps) Móviles: https://gobierno.usa.gov/apps-moviles
FDLP Partnership Collections: https://www.fdlp.gov/about-the-fdlp/partnerships
Featured videos: http://videos.usa.gov/access/
U.S. agency video library: http://www.usa.gov/Topics/Video.shtml
GPO: U.S. Government Manual- browse
LSU Libraries Federal Agencies Directory - browse agencies - search for agencies
Abbreviations and acronyms
List of U.S. government Tumblr blogs by Jed Sundwall and "about Tumblr" at USA.gov
List of 40+ U.S. federal agency blogs - similar list
Facebook: http://www.facebook.com/USAgov
Twitter: http://twitter.com/USAgov
YouTube: http://www.youtube.com/USGovernment
Blog: http://blog.usa.gov/ and RSS feed
Catalog of Government Publications (CGP): Simple search, Advanced search, Expert search, Browse search, and New titles (use for metadata and subjects for federal publications)
Documents Data Miner 2: http://govdoc.wichita.edu/ddm2/gdocframes.asp
MetaLib Federated Search:http://metalib.gpo.gov
to get reports, articles and citations from multiple U.S. Federal Government databases.
New Government Publications (reviews by Univ. of Montana, Libguide):
http://libguides.lib.umt.edu/content.php?pid=324032&sid=2652398
Alphabetical Agency List: http://ucsd.libguides.com/agencies
Browse Federal Documents by Call Number:
http://ucsd.libguides.com/browsebysudoc (an historical list of SuDocs assigned to agencies)
U.S. Digital Registry: about the digital registry
Social Mobile Digital Registry: about the social mobile digital registry