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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 that is small and can be carried in a pocket is known as
                        a                .





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