(July 20, 2015 at 2:52 pm)Atheist_BG Wrote: Sure, those abbreviations just came out of nowhere. The same way FBI means just FBI and CIA means just CIA. Right...
No, it did not come out of nowhere, but the "meaning" has shifted about:
https://en.wikipedia.org/wiki/DVD#Etymology
The origin need not be the current use, as in this case.
"A wise man ... proportions his belief to the evidence."
— David Hume, An Enquiry Concerning Human Understanding, Section X, Part I.