A mature company that makes something real, like a manufacturing business. A lot of stuff being made depends on a combination of hardware and software. The software side can't grow exponentially because the hardware can't, and because it doesn't experience the same level of investor interest as the "tech" industry. Yet it serves a useful purpose and often brings unexpected but interesting problems to solve.

I work at a company in the American Midwest that makes measurement equipment. A friend programs robots for a high tech factory. We're both musicians (and cyclists) and play in a band together.