Today I read a paper and I saw the phrase "ISIC rev2 3-digit industry level". I am wondering what "rev2" stands for, I did a search but cannot find any explanation so far.

1 Answer 1


It stands for "second revision".

These standards are changed (revised) from time to time. This designation tells the reader which version is being referred to.

See https://unstats.un.org/unsd/classifications/Family/Detail/8 . There you can see that that Rev 2 is out of date and you should use Rev 4.

  • So, "rev" here is just the edition of the industry classification, the bottom line of this phrase is "ISIC 3-digit industry level", am I correct? May 12, 2021 at 23:46
  • 1
    Yes. That's what it says. May 13, 2021 at 0:50

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