The technology is... fragmented. You'll see the remnants of things that are about on the level of 20th century Earth. You'll also encounter remnants of much more advanced or just simply alien technology.

The planet was in one half of an interplanetary war, which led to some of the inhabitants vanishing behind the dome, so they have the ability to generate energy barriers far in excess of what I'd consider our own society's technology.

Well, mostly in excess, that is.

[Please refer to entry for one Stark, Tony.]