翻訳と辞書
Words near each other
・ communications software
・ community of massive gaming agency
・ comnet
・ compact
・ compact cobol
・ compact disc
・ compact disc interactive
・ compact disc read-only memory
・ compact disc read-write
・ compact disc recordable
compact disc rewritable
・ compaction
・ compactness preserving
・ compaq computer corporation
・ compas pascal
・ compass
・ compatibility
・ compatible
・ compatible timesharing system
・ compel


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compact disc rewritable : FOLDOC
Compact Disc Rewritable
(CD-RW) A rewritable version of CD-ROM. A CD-RW drive can write about 650 megabytes of data to CD-RW media an unlimited number of times. Most CD-RW drives can also write once to CD-R media.
CD-RW media cannot be read by CD-ROM drives built prior to 1997 due to the reduced reflectivity (15% compared to 70%) of CD-RW media.
CD-RW drives and media are currently (1999) more expensive than CD-R drives and media. CD-R is sometimes considered a better technology for archival purposes as the data cannot be accidentally modified or tampered with, and encourages better archival practices.
Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-WR discs have a phase-change recording layer and an additional silver (aluminium) reflecting layer.
A laser beam can melt crystals in the recording layer into a non-crystalline amorphous phase or anneal them slowly at a lower temperature back to the crystalline state.


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