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    1 KiloByte (KB) equals 1024 bytes.
                                                                                    1 KB       =     1024 B
                           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 ExaByte (EB) equals 1024 PB.                           1 EB       =     1024 PB

                           1 ZettaByte (ZB) equals 1024 EB.                         1 ZB       =     1024 EB
                                                                                    1 YB       =     1024 ZB
                           1 YottaByte (YB) equals 1024 ZB.

                                Let’s BaCk-uP

                            Storage devices are used to store data and information for future use.
                            Magnetic disk is covered with a magnetic coating.
                            An optical disc is an electronic data storage medium that can be written to and read
                           using a low-powered laser beam.
                            The USB Flash Drive is a small portable data storage device integrated with a USB
                           (Universal Serial Bus) connector.
                            The basic unit for measuring the memory of a computer is byte.

                            Other units for measuring the computer’s memory are KiloByte, MegaByte, GigaByte,
                           TeraByte, and so on.
                           The parts of the computer that we can see and touch are called hardware.
                           The devices that are used to enter data into the computer are called input devices.
                           The device that works on the data (input) from input devices is called a processing device.

                           The devices which help us to get results or outputs from the computer are called output
                           devices.

                           Storage devices store our data and work, so that we can get it back whenever we need it.
                           A software that controls and manages all the activities of a computer system is called
                           system software.
                           The software that are designed to perform some specific type of jobs on a computer are
                           called application software.

                                                              Computer System Organization - Hardware, Software & Memory  51

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