> 15 years ago, I would not have said software developers, software engineers, or test engineers were part of IT. IT was that department that kept the corporate computers working and worked for the CFO, not part of the department that shipped products and worked for the VP Engineering.

When I worked for an enterprise software company close to 15 years ago, there was clear recognition of both IT-as-internal-organization and IT-as-industry, and both people who worked in IT-as-internal-organization and people who worked in the development and support of products in firms in IT-as-industry were widely recognized as working "in IT". AFAICT, that is exactly the same situation as now.

(This shouldn't be surprising, since IT-as-industry is effectively just the outsourced version of IT-as-internal-organization.)