What does new Section K cover?

New Section K in ISIC Rev. 5, UN Statistics Division, covers telecommunications, computer programming, consultancy, computing infrastructure and other information services. That wording groups the technical and service infrastructure around information, rather than the content itself, which is the distinction from new Section J. The two sections are neighbours in the alphabet and in the economy, which is exactly why the split needed careful explanatory notes at division and class level.

What makes Section K infrastructure rather than content?

Section K gathers the technical and service infrastructure around information, and the word infrastructure does real work in that sentence. Telecommunications networks, computer programming and consultancy, computing infrastructure, and other information services are grouped here not because they produce material for an audience, but because they provide the systems, connections, and services through which information is created, carried, processed, and used. A programming team building a system, a consultancy advising on that system, and a service running computing infrastructure for others all belong to this side of the split, even though their day to day work looks very different. What unites them is their position in the production chain: they support and enable information work, rather than supplying the content that audiences receive. Holding that image in mind, infrastructure on one side and content on the other, makes the section wording easier to apply than any list of job titles would.

Where do neighbouring J and K activities blur, and what settles the boundary?

The two sections are neighbours in the alphabet and in the economy, and neighbours share fences. Real organisations often combine content work with infrastructure work, an activity can change character over time as its methods change, and a new way of producing or distributing material can blur a boundary that once looked sharp. ISIC Rev. 5 handles that untidiness with explanatory notes, includes and excludes lists, and residual categories at division and class level, but those tools settle a case only when they are actually read. A reader facing a blurred case should therefore slow down and read the notes for both candidate categories, side by side, noting what each includes and what each explicitly sends elsewhere. The boundary is found in those notes, not in a general impression of which section an organisation seems to belong to, and a reader who records the uncertainty alongside the chosen category has done better work than a reader who forces a quick answer that later cannot be defended.

How should a reader walk the K hierarchy without skipping a level?

Start with the activity described in words, then move deliberately from section to division to group to class, testing the definition at each step. At section level, confirm that the infrastructure description fits better than the content description in Section J. At division level, check which broad block of infrastructure work the activity falls into, and read its note. At group and class level, check the finer notes and the excludes lists, because it is at these levels that a close neighbour most often redirects an activity. Skipping a level is tempting when a class title looks familiar, but a familiar word in everyday speech does not carry the technical definition that ISIC Rev. 5, UN Statistics Division, gives it, and the definition, not the familiar word, decides what is counted where. Where the finer levels cannot be justified from the evidence, the reader should stop at the broader level that is clearly correct and say so, rather than dressing uncertainty up as detail.

What belongs in the methods note for a Section K figure?

A methods note for a Section K figure should carry the version label, the level used, the reference period, and the source of the classification, together with any break in series where revisions or national adoption dates fall inside the comparison. That note matters because Section K figures travel: they appear in business registers, in national accounts, and in tables built from product, occupation, and trade classifications, and a label lost at the first table is lost in all of them. Before quoting such a figure, check that the four items are present, and check that the definition behind the title has been read, especially when the figure will be quoted elsewhere by readers who cannot see the working behind it. Titles invite quick guesses. Definitions reward the reader who pauses, and the pause is usually where the correct grouping is found.

This guide is offered as statistical classification only, with no individual outcome decided here: it does not determine any reader’s code, principal activity, or registration, and confirmation of a code for a specific record rests with the national statistical institute or business register that holds the record.