Correct. Even Sikorsky can't keep it straight w/in the same type/model.
I love how instead of starting big picture A/C systems and working down into more detail, and starting with basic checklists and how to do all the admin stuff (start, taxi, takeoff) in the RAG, we started out with all the computers/avionics.... the most complicated crap ever with endless acronyms.
I just came from a 57, and I'm reading all this crap, and after it's mentioned ONCE it is strictly an acronym. So I'm sitting there reading about the MD/FD, MFRs, FMCs, AMC, CSCs, CSCG, AMC, AOP, AST, ADT, ADC, EGI's (with alignments: HNAV, IF, GC, SH and DG), DALS/DFG, AFCS/AFCC, ETC ETC and needless to say, I don't have a fucking clue.