300-399 Social Sciences
- 300 Social Sciences, Sociology & Anthropology
- 310 Statistics
- 317 - FedStats
- 317.3 - U.S. Census Bureau
- 320 Political Science
- 320 - Dept. of State International Information Program
- 320 - FirstGov
- 320 - Politics1: Massachusetts
- 320 - Tax Forms: State
- 320 - Tax Forms: Federal
- 330 Economics
- 330 - Web Ec: Economics
- 331.7 - MonsterBoard
- 331.7 - Occupational Outlook Handbook
- 331.7 - O*NET Online
- 332 - Planet Feedback
- 332.45 - Yahoo's Currency Converter
- 332.63 - Historical Stock Quotes
- 332.63 - The Motley Fool
- 332.7 - Free Annual Credit Report [official site]
- 338.7 - Hoovers Business Directories
- 340 Law
- 340 - Massachusetts Trial Court Law Libraries
- 342 - National Archives
- 346.04 - Declaration of Homestead
- 350 Public Administration & Military Science
- 351 - State Governments
- 353.9 - Massachusetts Legislature
- 355 - United States Army
- 355.13 Medal of Honor Citations
- 355.5 - United States Marine Corps
- 358 - United States Air Force
- 359 - United States Navy
- 360 Social Problems & Social Services
- 368 - Social Security
- 368.4 - SHINE: MA Healthcare Information Service
- 370 Education
- 370 - Massachusetts Dept. of Education
- 371 - School Matters
- 378.16 - SAT
www.collegeboard.com- 378.16 - GRE: Graduate Record Examination
EDS - GRE- 378.16 - GED: General Educational Development
- 380 Commerce, Communications & Transportation
- 383 - United States Postal Service
- 384 - Phonebooks
AnyWho (AT&T)- 389.17 - Current Time
www.time.gov- 390 Customs, Etiquette & Folklore
- 390 - Kate's Holidays
- 394.26 - Earth Calendar
- 398.2 - Bulfinch's Mythology
- 398.3 - Snopes: Urban Legends
