Page 12 - KEC Khaitan C4 Flipbook
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There are three types of CDs:
Compact Disc-Read Only Memory (CD-ROM): It contains data that has been written
at the time of manufacturing and cannot be modified or erased.
Compact Disc-Recordable (CD-R): It allows only one-time recording. Data written once
cannot be erased.
Compact Disc-Rewritable (CD-RW): It allows multi-reading. Data written on it can be
erased or rewritten.
Digital Versatile Disc (DVD)
A DVD looks like a CD and can store up to six times more data than a CD.
There are two types of DVDs:
DVD
21 st
Digital Versatile Disc-Recordable Century #Initiative
Skills
(DVD-R): It allows only one-time
recording. “Do not hesitate to clear doubts from your
teachers. Learn something new every day.”
Digital Versatile Disc-Rewritable
(DVD-RW): It allows to delete and
rewrite data on it.
Blu-ray Disc
The Blu-ray is an optical disc storage device. It is called Blu-ray because it
uses a blue/violet laser light to read and write data. It is used to record and
store high-definition videos and can store up to 25 GB of data which is over
Blu-ray Disc five times more data than a DVD.
PURE A DVD and Blu-ray Disc can store up to 4.7 GB of data and 25 GB of data,
FACT respectively.
Pen/Flash Drive
A pen drive is a small-sized storage device. It can be carried from one place
to another in a pocket. It is used to transfer data from one computer to another
and can be connected to the Universal Serial Bus (USB) port of a computer.
Pen Drive
Memory Card
It is also known as multimedia memory card. It is very small in size usually
1-1.5 inches. These are used in various electronic devices like mobile
Memory Card phones, digital cameras, etc. You need to have a card reader to read the
stored data on a memory card.
10 Premium Edition-IV

