How to identify a s/w engineer?

See his left wrist. You might just check his right wrist. If no wrist watch, then he got to be a s/w engineer!
It is difficult to use the keyboard with the watch on the wrist. So, s/w tend to not have a watch at all. If at all they want to know the time, they have the clock on the right hand corner of their monitor.
To verify this, I just scrolled through the office. Each one of them had empty wrists!