Archived - Standard Industrial Classification - Establishments (SIC-E) 1980
- M - Business Service Industries
- 77 - Business Service Industries
- 779 - Other Business Services
- 7791 - Security and Investigation Services
- 7792 - Credit Bureau Services
- 7793 - Collection Agencies
- 7794 - Customs Brokers
- 7795 - Telephone Answering Services
- 7796 - Duplicating Services
- 7799 - Other Business Services n.e.c.
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