Which divisions moved into Section K?

Divisions moved into new Section K in ISIC Rev. 5, UN Statistics Division, as part of the same split, and the authoritative list is again the UNSD Rev. 5 structure. Telecommunications, computer programming, consultancy, computing infrastructure and other information services describe the section in words, and the divisions inside it give the detail. A reader should confirm any division number in the UNSD structure and in the Rev. 4 to Rev. 5 correspondence table, rather than copying a list from a secondary summary.

What does the section wording tell you before any division number?

The section wording tells you the kind of work to look for, and that is more useful, at the start, than any number. Telecommunications, computer programming, consultancy, computing infrastructure, and other information services describe a family of infrastructure and service work around information, distinct from the content work in Section J. A reader who holds that family image in mind can test a candidate division quickly: does this division describe a network, a system, a consultancy service, a computing service, or another service around information, or does it describe content made for an audience? If the answer points toward content, the reader is probably looking in the wrong section, however familiar the division title sounds. Numbers come after that test, not before it, and they should be confirmed in the UNSD structure and in the Rev. 4 to Rev. 5 correspondence table, rather than copied from a secondary summary that may reflect a different revision or a simplification.

How do correspondence rows and explanatory notes work together for Section K?

Correspondence rows and explanatory notes answer different questions, and a sound division check needs both. A correspondence row answers a historical question: where did this old category go, or where did this new category come from? An explanatory note answers a definitional question: what does this new category actually cover, what does it include, and what does it explicitly send elsewhere? A reader who uses only the correspondence table may land in a plausible division whose note does not match the activity described. A reader who uses only the notes may find a fitting division without noticing that the comparison they intend crosses a revision break. Used together, the two sources close both gaps: the correspondence row narrows the candidates and flags the break, and the note tests each candidate against the activity in words. The result should be recorded with its version label, ISIC Rev. 5, UN Statistics Division, and its level, so the path can be retraced.

Where do mixed activities test the Section K divisions most?

Mixed activities test the divisions at their edges, and the edges are where real work usually lives. An organisation may run a network, build systems, advise clients on those systems, and operate computing infrastructure for others, all under one roof, and its overall character cannot be read off any single one of those strands. An activity can also change character over time, as its methods change, so a division that fitted last year may fit less well now, and a new method of production can blur a boundary that the notes drew sharply. In such cases the reader should read the notes for both candidate divisions, note what each includes and excludes, and record the uncertainty rather than forcing a quick answer. Where the evidence does not justify a fine division, reporting at the broader level that is clearly correct, and saying so, keeps the figure honest. A methods note written at the time of use, naming the version, the level, the reference period, and any break in series, saves the next reader from having to reconstruct a decision that was never recorded.

What methods note keeps a Section K division figure checkable?

A checkable note is short but complete. It names the activity in words, the divisions considered, the division or broader level chosen, and the note or correspondence row that supported the choice. It names the version, the level, the reference period, and the source, so a reader in another country can open the same UNSD structure and follow the same steps. It flags any break where revisions or national adoption dates fall inside the series, because a jump at a break point may reflect the revision rather than a change in infrastructure work. And it travels with the figure into every table that reuses it, including business registers and national accounts, because a label lost at the first use is lost downstream as well. Definitions, read before titles are trusted, are what make that note possible, and the pause to read them is usually where the correct division is found.

The scope of this guide is statistical classification only, and no individual case is decided by it: it does not determine any reader’s code, principal activity, or registration, and a code for a specific record should be confirmed with the national statistical institute or business register that holds the record.