"Because I had dropped out and didn’t have to take the normal classes, I decided to take a calligraphy class to learn how to do this. I learned about serif and sans-serif typefaces, about varying the amount of space between different letter combinations, about what makes great typography great. It was beautiful, historical, artistically subtle in a way that science can’t capture, and I found it fascinating.
"None of this had even a hope of any practical application in my life. But 10 years later, when we were designing the first Macintosh computer, it all came back to me. And we designed it all into the Mac. It was the first computer with beautiful typography."
http://bits.blogs.nytimes.com/2011/10/06/steve-jobs-designer...
'History of Math' (Algebra was not developed until the dark ages? etc) 'foundations of geometry' (starts with logic and builds to counting and Euclidean geometry) 'Information Security' (Mostly a people problem.)
Where the purely technical classes like C++ and Databases where fairly useless by themselves.