This function returns Standard Industrial Classification [SIC] codes and the corresponding North American Industry Classification System [NAICS] identification.
sic_naics_codes(filter_duplicates = TRUE)
| filter_duplicates | 
  | 
    
|---|
a tibble
Other dictionary: 
dictionary_fred_ids(),
dictionary_sec_filing_codes(),
dictionary_sec_form_codes(),
dictionary_sic_codes(),
location_codes(),
sec_rules()
sic_naics_codes(filter_duplicates = TRUE)