Yeah, we do both. I'm referred to as an AS100, but my rank is C/4C. Sophomores are C/3C, and then POC are whatever cadet rank they're assigned (e.g. C/Maj, C/1st Lt). We don't use C/2C or C/1C. I really only use the C/4C for signature blocks, paperwork, etc. But when referring to the class group...