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Pen Drive

                  Pen drive acts as a portable hard drive and is easy to use as it is small
                  and can be carried in a pocket and plugged into any computer with a

                  uSB drive. pen drive has storage capacity of upto 1tB.                                 Pen Drive
                                        Memory Card

           Prime (Ver. 2.2)-lV  Memory Card  very small in size usually 1–1.5 inches. It is used in mobile phones
                                        Memory card is commonly known as multimedia memory card. It is


                                        and digital cameras. you need to have a card reader to read the

                                        stored data on a memory card.


                  Solid State Drive (SSD)

                  An  SSD is a  type  of storage  device that  holds  information,

          10      like  your  pictures,  games,  and  documents.  An  SSD  uses  the
                  technique  of  flash  memory  to  store  data.  It  is  much  faster
                  than a hard disk. SSDs are more durable and reliable than hard                         SSD

                  disks. they come in various capacities, typically 128 GB to several tBs. Nowadays,
                  desktop computers and laptops come with SSD instead of traditional hard disk.


                   Measuring the Computer's Memory



                  The basic unit for measuring the memory of a computer is byte. A byte consists of
                  a group of eight bits, for example, 10001011, i.e., 1 byte equals to 8 bits. A group of
                  4 bits is known as a nibble (half byte), for example, 1001, i.e., 1 nibble equals to 4

                  bits.  Other  units  for  measuring  the  computer’s  memory  are  kilobyte,  megabyte,

                  gigabyte, terabyte, and so on.

                    1 Kilobyte (KB) equals 1024 bytes.
                                                                                        1 KB       =    1024 Bytes
                    1 Megabyte (MB) equals 1024 KB.
                                                                                        1 MB       =    1024 KB
                    1 Gigabyte (GB) equals 1024 MB.                                    1 GB       =    1024 MB

                    1 terabyte (tB) equals 1024 GB.                                    1 tB       =    1024 GB

                    1 petabyte (pB) equals 1024 tB.                                    1 pB       =    1024 tB
                                                                                        1 eB       =    1024 pB
                    1 exabyte (eB) equals 1024 pB.
                                                                                        1 ZB       =    1024 eB
                    1 Zettabyte (ZB) equals 1024 eB.                                   1 yB       =    1024 ZB

                    1 yottabyte (yB) equals 1024 ZB.
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