Coder vs. programmer vs. developer vs. system architect

It's not a protected title. However I doubt the guy in the article could write his own OS. Which I can.

Also keep in mind the phases of learning and understanding:

1. I know nothing...this is so hard.

2. I know everything...this is so easy.

3. I know nothing (again), but this time for real since I realized there is so much more to learn.

4. I really, really, really know nothing.

5. Hmm...maybe I might be getting the hang of this.

And in phase 5 other people start calling you a guru. However you'll have no problem finding a job in phase 2.