Is it the CEO, CTO, COO, CIO, CMO, CSO?

This is a loaded question. One  must understand the responsibilities of each of these roles first. Do you know the  difference between a CIO & CTO, Sales & marketing?
Your comments (or see the following poll) are welcome on this topic, I will publish my thoughts in a week (OR whenever I find some free time and not working on myGPSID!!!)
[polldaddy poll=1157574]