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My first thought was, not specifically, but something with similarities to New Century Schoolbook. I realize it’s kind of a trite face by now, ubiquitous as it is on so many computers, but there's also a comfort in its familiarity. And its open, generous character width makes for readability, I think, that might make training materials easier on the eyes.
Can anyone suggest anything—perhaps nothing exotic—that has a similar degree of ease on the eyes and reability, but that isn’t overused?