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    Compact Disc (CD)

                  Compact disc (CD) is an external storage device. It can hold upto 700 MB of data.
                  The CD drive reads information stored on a compact disc. CD drive is usually
                  connected inside the CPU box but can also be connected using a USB port.

                                        Digital Versatile Disc or Digital Video Disc (DVD)                       CD

                                        DVD is almost similar to a CD. The only difference is that it can hold more
                                        information than a CD. DVDs are widely used for storing and viewing
                                        movies and other data. The DVD drive reads information stored on a

                          DVD           DVD.

                  Blu-ray Disc

                  Blu-ray disc is an optical disc. It is used for storing a large amount of data. The
                  main difference between DVDs and Blu-ray discs is that storage capacity of
                  Blue-ray disc is higher than that of the DVD.                                              Blu-ray disc

                                          Pen Drive
                                          Pen drive is a portable storage device and is easy to use as it is small and

                                          can be carried in a pocket and plugged into any computer with a USB

                       Pen drive          drive. Pen drive has storage capacity of upto 1TB.
                  Memory Card

                  Memory card is commonly known as multimedia memory card. It is very small

                  in size usually 1-1.5 inches. These are used in smart phones and digital cameras.
                  You need to have a card reader to read the stored data on a memory card.
                                                                                                             Memory card

                                     Suppose you could create a virtual memory palace in your mind using a computer.
                                     What  rooms and  objects would  you  include  to help  you  remember important
                                     information, like math formulas or historical facts?

                           Topic Flashback                                                 21 st  Century   #Technology Literacy
                                                                                               Skills
                         Fill in the blanks.

                         1.                 is called the storage space in a computer.

                         2.                 holds the data even if the system is switched off.
                         3.   A portable storage device that is small and can be carried in a pocket is known as
                            a                .

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