But even well-guarded systems can be successfully hacked as Sterling (1993) notes, and the processes of both hacking and cracking are in many ways becoming easier all the time as more and more users (who have less and less technical knowledge about how their computers actually work) use a smaller and smaller set of programs (and operating systems) each year. As in the world of biology, homogeneity in computer use makes the population far more vulnerable to a range of infections and attacks.