A Nerd is a name associated to a computer professional who is a hard core technical guy who lives a digital life in and out. There are some jokes shared by nerds and geeks and it is hard for a non technical guy to understand these jokes easily. I bumped into the page in Wikipedia on Computer Humor. The one below caught me.
Q: Why do programmers confuse Halloween and Christmas?
A: Because Oct 31 equals Dec 25.
I must admit that it took me few seconds to realize that Oct above meant octal number and Dec meant decimal number