Dave Lister:
What are these things?
Kryten:
They're Digital Versatile Discs, sir. DVDs for short. They were very popular in the early part of the 21st century before they died out and were replaced with what we use now.
Dave Lister:
Oh, you mean videos?
Kryten:
Precisely. Back then no one knew that the human race were utterly incapable of putting the DVDs back in their cases. Case in point: over 2 trillion went missing in just over 20 years. Videos are just too big to lose.
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