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When you were a child, you were taught about alphabets and numbers. Do you still remember
                  them?  How?  This  is  because  these  were  stored  in  your  memory.  Just  like  human  memory,
                  computers also have memory to store all the data and instructions for performing various tasks.

                  Data and Information

                  In your daily life, you come across a lot of facts and figures in the form of numbers, images,

                  etc.  These  are  called data.  You  can  say  that  a  collection of  raw  and  unorganised facts
                  is known as data. When this data is organised and given a specific context, it becomes
                  information.

                  Memory

                  The data and instructions that are entered into the computer using input devices are to be

                  stored in the memory. There are two types of memory:
                  1. Primary Memory
                  2. Secondary Memory

                  Primary Memory

                  This is the main memory of the computer. The CPU can directly access this memory. It is
                  fixed on the motherboard of the computer.

                  Primary memory is further divided into two types:
                  1. Random Access Memory (RAM)

                  2. Read Only Memory (ROM)
                  Random Access Memory (RAM)


                  RAM is  a  temporary  memory.  The  information
                  stored in this memory is lost when the computer
                  is turned off. That is why it is also called volatile
                  memory. It stores data and instructions given by the user and also the results produced by

                  the computer temporarily.

                  Types of RAM
                  1.  Dynamic RAM (DRAM): It requires continuous power to refresh the data stored.

                  2.  Static RAM (SRAM): It also requires constant power to hold on to data, but it does not
                     need  to  be  continuously  refreshed  the
                     way DRAM does.                                        The human brain can hold about 2.5
                                                                        petabytes of information, equivalent to a
                  However, SRAM is significantly faster and
                                                                         TV show being played for approximately
                  uses less power than DRAM.
                                                                                   342 years non stop.






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