This video discusses the nomenclature of NACE (Nomenclature of Economic Activities), the European statistical classification of economic activities. It also gives an example of a NACE code. The document that is referred to in the video is NACE Rev. 2 and can be found here:
https://ec.europa.eu/eurostat/documents/3859598/5902521/KS-RA-07-015-EN.PDF