Nerys opened her mouth to exclaim in surprise, but paused and frowned, wondering if Mark, like Peggy, was from somewhere isolated, or some other when--tricorders were pretty damn basic, after all, and had been for centuries.

"It's a handheld computer," she said, and hoped she wouldn't have to explain exactly what a computer was, to the point that it was probably visible on her face. "Scans and processes and records, though it's not extensive by any stretch of the imagination. Even so, we'd be able to make educated guesses instead of stabbing around in the dark."