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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                                      Pen
                                                         Disk          CD           DVD          Drive         SSD
                          RAM            ROM

                                                           Blu-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 do not lose 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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