Really? This might be news to the vast majority of engineering and computer science students the world over... While not every college works directly with "real" unix source code for their CS students in OS System Design or Compiler Design classes, you can be that they do use "unix-ish" OS's like Andy Tanenbaum's "Minix," or Linux.
And I remember being an EE TA (I was a CS major) and working with EE juniors and seniors, helping them to learn the System V commands and utilities they needed to work on the AT&T 3B2 and 3B20 systems they used for graphics design classes, and the 4.2BSD commands and utilites on the VAX 8600 systems they used as well.
Mark
"Really? This might be news to the vast majority of engineering and computer science students the world over... "
It may surprise you, but the vast majority of schools are NOT "engineering and computer science".