Back in the middle of the last cen-tury when I went to engineering school, we didn't have a Human-Machine Interaction course offered, not even as an elective. I'm happy to see that's changed somewhat and that some institutes of higher learning are offering such instruction, at least at post graduate level. I think knowledge of the field is desperately needed. One recent Friday night, I picked up a new cell phone. (I was pushed to do so by text messages I was receiving from my service provider telling me that my old phone's analog-type service would soon be part of technological history.) I then spent the weekend trying to educate myself about my new phone's "intuitive" interface.
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