20 21 Business-to-Consumer 1997 1
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B. ID ID ID ID A. Web B. C. ID URL ID (1) (2) (3) A. B. 13
URL A. B. C. (A) 14
(B) CM JIS 2 DVD 15
2 OS DVD RPC(Regional Playback Control) CSS(Contents Scrambling System) DVD ROM 16
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