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External hard disks are also available. They are the hard disks that can be connected to any
                 computer with the help of a USB (Universal Serial Bus) port.

                 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.                                                                                     CD



                                       Digital Versatile Disc or Digital Video Disc (DVD)

                                       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



                          Double Tap                                                 Century   #Technology Literacy
                                                                                        21 st
                                                                                       Skills

                        Fill in the blanks.

                        1.  The storage space in a computer is called                             .

                        2.  ROM is the                              memory.

                        3.                              is a portable storage device.




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