In light of [your question][1], some thinking around the [answer from @Midavalo][2], the way ArcGIS Pro has been positioned as an application of ArcGIS Desktop, and my growing unease with one of the compromises that https://gis.meta.stackexchange.com/questions/3131 makes, my views on how best to tag ArcGIS Desktop questions have evolved.

ArcGIS Desktop is a product from Esri, and 3D Analyst is one of its extension products.  Together, they provide five ArcGIS Desktop applications:

 - ArcMap, ArcCatalog and ArcGIS Pro are unlocked by an ArcGIS Desktop core license.
 - ArcGlobe and ArcScene are unlocked by an ArcGIS 3D Analyst license.

In light of ArcGIS Pro becoming much more mainstream, and inevitably supplanting the other four (ArcGIS Desktop 10.x) applications, I think the best way to tag new questions may be:

 - [tag:arcmap] for questions about ArcMap
 - [tag:arccatalog] for questions about ArcCatalog
 - [tag:arcglobe] for questions about ArcGlobe
 - [tag:arcscene] for questions about ArcScene
 - [tag:arcgis-pro] for questions about ArcGIS Pro
 - [tag:arcmap] and [tag:3d-analyst] for questions about ArcMap that use toolbars and geoprocessing tools that are only available with 3D Analyst licensing
 - [tag:arcgis-pro] and [tag:3d-analyst] for questions about ArcGIS Pro that use ribbon tools and geoprocessing tools that are only available with 3D Analyst licensing

With respect to old questions I think a manual retagging campaign should not be undertaken.  I suspect we can automate a tag overhaul to a new scheme but it will need to be multi-step, and well planned, so doing that in advance of deciding the desired outcome is premature.

Pending further discussion here, I would plan to overhaul https://gis.meta.stackexchange.com/questions/3131, but my current thinking is that a significantly better ArcGIS tagging scheme than I originally proposed is possible.


  [1]: https://gis.meta.stackexchange.com/q/4893/115
  [2]: https://gis.meta.stackexchange.com/a/4895/115