Early ComputersIntern: I’m studying early computers in my Intro to Computing course.Technology is so much more advanced now!Engineer: Yes, we’ve come a long way since the days of vacuum tubes.Intern: Definitely. We watched a (1)program about those. It said that tubes failed practically every day. Can you imagine that?Engineer: I’m sure it was really frustrating.Intern: Solid-state (2)is so much better. Hard drives hold so much more information. And they’re way more reliable.Engineer: Well actually, a hard drive isn’t solid-state. It’s electromechanical.Intern: Really? I thought they were made from solid parts.Engineer: Technically, that's true. But (3)with moving parts aren’t really solid-state.Intern: Oh, okay. I thought solid-state just meant it didn’t have (4)tubes.Engineer: No, solid-state electronics are made out of semiconductors.Intern: That means they have both electrons and (5)holes, right?