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1                       Computers—Storage



                                                      and Memory Device











                         Chapter Profile

                            Data and Information
                            Memory

                            Measuring the Computer’s Memory



                 When you were a child, you learned about alphabets and numbers. Do you still

                 remember those? How? This is because those 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 you organise the data and provide a

                 specific context, it is called information.

                     MEMORY

                 The data and instructions that are entered into the computer using input devices are
                 stored inside the memory of computer. There are two types of computer 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.

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

                 2.  Read-only Memory (ROM)


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