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Factopedia                                              1 KB       =     1024 B

                                                                                 =
                                                                      1 MB
                                                                                       1024 KB
                                                                      1 GB       =     1024 MB
                                                                      1 TB       =     1024 GB
                                                                      1 PB       =     1024 TB

                                                                      1 EB       =     1024 PB
                                                                      1 ZB       =     1024 EB
                    Reynold B. Johnson                                1 YB       =     1024 ZB

                   is known as “Father
                    of the Hard Drive”.


                                                           Let’s Back-uP

                                                        Storage devices are used to store data and information

                                                      for future use.
                                                       Computer memory is place where data and information
                                                      are stored.
                                                       Primary Memory is the main memory of a computer.

                                                       The information stored in RAM is lost when the computer is
                      When we start                   turned off.
                     a computer, the                   SRAM is a type of memory that holds data without needing
                     operating system
                   and all software are               to be refreshed.
                     loaded into RAM.                  DRAM  is a common  type  of memory  that  needs  to  be
                     This means that                  refreshed thousands  of times  per second  to  keep  the
                      higher the RAM                  information.
                      capacity, faster
                      is the computer                  Information stored in ROM is permanent in nature, i.e., it
                       performance.                   holds the data even if the system is switched off.
                                                       Secondary  memory  is  permanent  in nature  and allows
                                                      users to store data that may be easily retrieved.

                                                       An optical disc is an electronic data storage medium that
                                                      can be used to write and read using a low-powered laser
                                                      beam.
                                                       Flash  memory, also known  as flash  storage,  is a type  of
                    The term 'byte' was
                     coined by Werner                 non-volatile memory.
                     Buchholz in June                  An SSD is a type of storage device that holds information,
                           1956.                      like your pictures, games, and documents. An SSD uses the
                                                      technique of flash memory to store data.



                  12    Plus (Ver. 2.2)-IV
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