Eh, I don't live in the US and I'm not up to date on the slang, but honestly a sentence like "some people work in technology while others design equipment for IC manufacturing" sounds quite silly to me. I'll try to remember now.

Apologies for being obtuse. It was me, not you, that failed at communication. :)

The type of work, though, and skills required are quite different, regardless of that they technically both develop and involve 'technology'. Semiconductor lithography requires a pretty exciting mix of skills starting with plain physics (classical and by now a bit of quantum optics), materials science, mechanical engineering, data analysis/science, software engineering (both for simulation and analysis of production of lensing systems), and I'm sure I'm missing half. It is quite different from "writes software for a software company", which is the framing I had interpreted from the comment I originally responded to.

I don't think your interpretation is wrong, just the context of a HN thread makes it more likely "tech" is software related.

That's the gross oversimplification I went for, indeed!