From Alan's perspective, random students occasionally show up and have over DVDs (sans envelopes). I suspect Tim T already knows what's happened prior to that.
Brain Dump Alan De Smet Release Archives
We archive releases in both binary and source form to DVD. They're stored in paper sleeves in a set of black CD boxes. Write the release number on the envelope to make it easy to find them. The unused sleeves themselves are stores in one of the boxes; at the moment they're being used as a spacer to keep the DVDs from falling over.