compustat global data part iii reference codes august 2 2002 785 sic what are standard industrial classification the system of was created by us office management and budget 4 digit which correspond to various business or activities such as oil gas extraction printing publishing services spc assigns a primary code each company in database according its activity determined revenue industry abrasive products 3291 asbestos misc minrl 3290 accident health insurance 6321 ins med plan 6320 account audit bookkeep svcs 8720 8721 adhesives sealants 2891 adjustment collection 7322 admin economic programs 9600 educational 9410 9411 environ quality housng 9500 environmental 9510 gen 9610 9611 housing 9531 urban develop 9530 human resource program 9400 public 9430 9431 social 9440 9441 planning 9532 vet affair ex hlth