I've worked at old-school telcos and startups alike.
It was acceptable to bring your own keyboard and mouse to two out of the five companies, other than that, no other hardware was allowed to be brought in. So you are stuck with the monitors provided, with the rest of the hardware that was provided, and while you could bring in limited ergonomic stuff, you were also limited to whatever office furniture was available.
It was acceptable to bring your own keyboard and mouse to two out of the five companies, other than that, no other hardware was allowed to be brought in. So you are stuck with the monitors provided, with the rest of the hardware that was provided, and while you could bring in limited ergonomic stuff, you were also limited to whatever office furniture was available.