IBM isn't considered a tech company?
https://www.statista.com/statistics/274823/ibms-global-reven...
I therefore posit there is no such thing as a "tech industry", but rather businesses that sit on a spectrum of operating models from:
- Back office IT supported
- Tech enabled
- Tech Led
Personally I would define IBM as a Diversified IT, IT Services and Software company that is has an operating model that sits somewhere between tech enabled and tech led.