I had a chance to talk to Ken Jennings the other day. Since I'm a programmer, I asked him about his pre-Jeopardy! career as a software engineer for a healthcare company. He told me that he was a Java programmer, using both the Emacs and vi text editors. That's a lower-level way to do coding, compared with the integrated development environments (IDEs) that most programmers use these days.
He worked at that programming job right after college, so it around the years 2000, 2001, etc. Now he's the sole host of the Jeopardy! show. He tapes a week's worth of shows in a single day, and I bet we'd all like to work only one day a week!