Linked by the_randymon on Tue 29th Jan 2013 00:20 UTC
Any modern operating system consists of layers upon layers of systems, services, and libraries. Increasingly, no one can possibly have full understanding of all the layers of the cake. Here's RedHat developer Peter Hutterer's description of what it takes to move the cursor on your screen. Interesting to get back to the basics, and a good reminder of how complicated this stuff really is.