That's a gross generalization, an insulting stereotype, and just generally an a**hole thing to say. For what it's worth I'm an engineering physics student with better spelling, grammar, and vocabulary than most language majors. [READ: In the 99th percentile, nationally] So not only are many of us "able to spell correctly" we can do vector calculus much better than the average bear. The image of the snorting lab dork in front of a basement chalkboard is a bit outmoded, to work in the engineering industry today you are expected to be well rounded. Perhaps the OP's spelling issues were rooted in something as simple as typographical errors or maybe, like me, his hands are too large to comfortably fit an average keyboard. Why be hateful?