I have to say, inventing fictitious units of measurement was one of the smartest things modern Trek did. How much is an "isoton" or a "gigaquad"? I don't know, and as long as it avoids stuff like that, I don't care.
I remember reading a website somewhere where the author had "deconstructed" some of the treknology related to computers. (I guess as if they where even trying to be consistant with it, but I'd argue TNG put some effort to a semblance of consistancy/realisim when it came to their technobabble.)
Anyway. This guy had deduced that 1 Gigaquad in Treknology is equal to a Billion Gigabytes.