So, these are two things that I'm finding somewhat confusing. Are both of these correct? They both appear to describe an analyst which belongs to, or is at least part of, Human Resources. The first is a compound noun, and the second is use of the possessive apostrophe. Human Resources analyst AND Human Resources' analyst Secondly, I understand the greengrocer's apostrophe is incorrect usage (e.g. "potato's and carrot's"), but I was wondering if acronyms can ever be considered words (e.g. CDs and DVDs), and prior to that point I wondered if usage of the apostrophe to denote plurality has become acceptable? My instinct would say it has not, but in the vast majority of instances, MPs are referred to as MP's (which I would think is wrong). I presume this will become the correct convention ultimately, but I'd be interested to know if it was already the case. Thanks!