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TYPES OF COMPUTER MEMORY


                 The computer memory can be classified into two types:
                     Primary Memory                    Secondary Memory


                                                    Computer Memory








                       Primary Memory                                             Secondary Memory





                                                        Hard Disk            CD           DVD           Pen Drive

                     RAM             ROM

                                                               Blue-Ray Disc                 Memory Card



                 PRIMARY MEMORY
                 Primary memory is the main memory of the computer. It is also known as internal memory.

                 It holds the data and instructions that the computer is currently working on and makes it
                 easily accessible for the CPU to process.

                 Primary memory is further divided into two types:

                 Random Access Memory (RAM)

                 RAM is a volatile memory.  The data or information stored in
                 this memory is lost when the processing is incomplete or the
                 computer is turned off. That's why it is also called temporary                      RAM
                 memory. There are two types of RAM:

                     Dynamic Random Access Memory (DRAM)
                     Static Random Access Memory (SRAM)


                 Read Only Memory (ROM)

                 ROM is a non-volatile memory.  The data  and information  stored
                 in this memory is not lost even if the computer is switched off. It is
                 permanent in nature. There are three types of ROM:

                     Programmable Read Only Memory (PROM)                                               ROM
                     Erasable Programmable Read Only Memory (EPROM)

                     Electrically Erasable Programmable Read Only Memory (EEPROM)


                                                                                                Computer Memory    9
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