~>  EC> Actually, many of them cannot.  It is amazing that you didn't know
that.
 
~> Does one not need to buy special DVDs so you can record over previous
~> recordings? (that is my understanding of the situation). 

Yes.  Technically one does not record to a DVD.  Prerecorded data is burned
into them in a mass-production process.  One can record to a DVD-R however
- just once.  To erase and reuse, you need a DVD-RW - a special type of
disk, costs more, and doesn't last long if frequently erased and
re-recorded.  Bob of course will insist that all three types are covered by
his use of the term "DVD."
 
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