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VHS replaced previous technology...
8 track replaced records for the most part
cassettes replaced 8 track
CDs replaced cassettes
mp3s replaced CDs for the most part
DVDs replaced VHS for the most part
Bluray is slowly moving into DVD territory...
As digital media expands, other things are partially or completely replaced.
Oh and as a side note, Daithi, that 1001books site in your sig has been down for some time.
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