Standard Classification of Occupations National Occupational Classification (NOC) (in Canada) Occupational Information Network (O*NET) Comprehensive information based largely on input from individuals who have personally performed over 970 'data-level' occupational categories; taxonomic information about 40 'non-data-level' categories (970+ 40 = a total of 1010 occupations); includes 840 SOC categories and many specialized O*NET-SOC categories. Occupational Outlook Handbook (OOH) Created and maintained by the U.S. Bureau of Labor Statistics (BLS) References U.S. Department of Labor (2000). Standard Occupational Classification (SOC) Manual (2000 ed.). Washington, D.C. External links The Standard Occupational Classification (SOC) System Occupations Employment classifications