Memory directly accessed by CPU - random-access memory,RAM

Discussion

• Nirja Shah   -Posted on 25 Nov 15
  - Random-access memory (RAM) is a form of computer data storage.
  
  - It allows data items to be accessed (read or written) in almost the same amount of time irrespective of the physical location of data inside the memory.
  
  - In contrast to the other direct-access data storage media such as hard disks, CD-RWs, DVD-RWs and the older drum memory, the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement delays.
  
  - In today's time random-access memory has taken the form of integrated circuits.
  
  - This memory is normally associated with volatile types of memory (such as DRAM memory modules), where stored information is lost if power is removed, although many efforts have been made to develop non-volatile RAM chips.
  
  - Other types of non-volatile memory exist that allow random access for read operations, but either do not allow write operations or have limitations on them.
  
  - These include most types of ROM and a type of flash memory called NOR-Flash.
  
  

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