But I also expect them to be a fast learner.
ie I will say electro magnetic pulse once then from then on say EMP
An example from my own writing: I once used the acronym 'HUD' in casual exposition...never suspecting that some would not know it stands for Heads-Up-Display (or Head-Up-Display; I've seen both versions used). In any case, I was describing a tactical display projected before a character's face by using established military tech jargon. Even after I wrote out the acronym's meaning, it was still unfamiliar to some readers.
I think you just can't win sometimes, and it's useless to worry too much over what you do and do not use.
I have to admit, I've needed to grab a dictionary from time to time while reading stories, just to be sure I knew what the heck an author was referring to. Perhaps that's a good thing to do every once in a while? Make 'em dig out the dusty ol' Merriam-Webster for a spelling bee.
Inkwell
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"The difference between a writer and someone who says they want to write is merely the width of a postage stamp."
-Anonymous
[This message has been edited by Inkwell (edited February 06, 2006).]
I wouldn't explain DVD, but I would explain EMP.
If it can be found on a Wal-mart shelf you don't need to explain it.
You might have to ask yourself what are the things about the unknown idea/device that you need the reader to know.
In the case of the HUD, it might be the fact that the only one who can see what is on the HUD is the person wearing the helmet with HUD capabilities. In that case, you might want to have someone else ask the helmet wearer what his HUD tells him.
If it's something else about the HUD, and if you can come up with some other way to "show" what you want the reader to know, that is probably the best way to get the information across.
Within context, I would've figured out heads up display (eventually). However, other readers might not. Plus, there is the issue of not being able to get the first thing you thought of out of your head.
Often as not, a [good] science fiction writer will layer on any number of details, technological or otherwise, to emphasize that the story is set and the characters are living in a place much different from the place the readers live in.
I'd beware of using too many unfamiliar terms. Even in real life, people can be baffled by them. In my job, I have to work with OCRs, MLOCRs, GPCs, UTSs, DBCSs, and CIOSSs. (Some of these, written out in full, have never actually been layed out to me. I don't expect any of you to know what they mean, unless you also do what I do.)
If I was working with someone who didn't know these terms, it would be okay for me to stop and specify what they meant. But mostly I'm working with people who should know (or who are supposed to know but don't, training being what it is where I work), and any explanation would be a waste of my time.
If you're writing something, you can introduce someone who doesn't know what's what, and someone who does know can explain (hopefully briefly, because it could really bring things in the story crashing to a halt). But it would be redundant (and also bring the story to a stop) for those who know to explain things to those who also know.
If I were doing it, well...well, I usually do, but that's besides the point...anyway, I'd use some unfamiliar terms and concepts and technologies, not necessarily bringing up an explanation right away, but maybe later in the story. (In a novel, one has a lot of room to slip in a few words.) Some things, though, would have to continue to remain a mystery to the reader, both for lack of opportunity to introduce a good explanation, and to keep a certain air of mystery in the story.
(I remember running across the term "emp" in Vernor Vinge's "Marooned in Real Time" (excellent book, I recommend it), in dialog, along the lines of a character saying someone was "trying to emp me out" in the middle of a battle. If I hadn't already been familiar with the term, I wouldn't have known what it meant. As is, when I hit it, it stopped the story as I pondered just that fact. You can see it's a potential minefield.)
-Monolith-
But if you say that the fleet's sensitive electronics were knocked off-line by an EMP generated by a high altitude nuclear blast, then you don't need to explain that "EMP" stands for "electo-magnetic pulse". It is common knowledge that nukes produce EMP, so much so that we are treated to portrayals of them doing so in situations where they would do nothing of the kind.