Is CRE and CRO the same thing?

I'm curious to know if CRE and CRO are one and the same. As someone who's relatively new to the world of cryptocurrency and finance, I've come across these two terms quite frequently but have yet to grasp the distinction between them, if any. Could you please clarify whether CRE and CRO represent the same concept or if they serve distinct purposes within the industry? Your insight would be invaluable in helping me better navigate this complex landscape.