9 minutes ago, Animewarsdude said:I genearlly saw it as the first 2 digits being the series number while the remaining 2 were just a part of the model number or batch number. I strongly suspect there were hundreds of R2-D2s, but were likely painted differently, and spread throughout the galaxy. Droids like ships and items do not start unique, they become unique over time and by those who they are around. That is unless someone you know custom builds a droid or whatever. Your car might be important to you, but is likely not to someone else, in fact that is one of the reasons that Anakin was treated as weird since the other Jedi had the mentality that if their droid was damaged or destroyed they just got a new one.
CB is still a BB unit, her name in the script was BB until they thought that might be confusing for the audience so they changed her name.
That is probably the case and how they decided to explain it (also what I personnally believe to actually make sense out of it), but that is not what the movies suggest, that there is more digits following the unit designation.
CAPT. PANAKA : ...An extremely well put together little droid. Without a doubt, it saved the ship, as well as our lives. AMIDALA : It is to be commended...what is its number? The LITTLE BLUE DROID lets out a series of bleeps.CAPTAIN PANAKA leans over and scrapes some dirt off of the side of the DROID and read the number: CAPT. PANAKA : R2-D2, Your Highness. AMIDALA : Thank you, Artoo Detoo. You have proven to be very loyal...Padme
Now you know me, I personnally don't care about (and actually like) explanations in books outside of the movies, but from someone that only watch the movies, it looks kinda stupid.
As for CB still being considered a BB unit, if we don't care about the original script (using an original script to explain something is even worst than using a book that actually extend the universe if you ask me), is there a in-universe reason why she's still considered a BB unit even though her appellation start with CB?