Describe the key characteristics of computer memory systems. Explain the features of different categories of storage technology of computer system.

The key characteristics of memory devices or memory system are as follows:

1. Location
2. Capacity
3. Unit of Transfer
4. Access Method
5. Performance
6. Physical type
7. Physical characteristics
8. Organization

1. Location:

It deals with the location of the memory device in the computer system. There are three possible locations:

CPU : This is often in the form of CPU registers and small amount of cache

Internal or main: This is the main memory like RAM or ROM. The CPU can directly access the main memory.

External or secondary: It comprises of secondary storage devices like hard disks, magnetic tapes. The CPU doesn’t access these devices directly. It uses device controllers to access secondary storage devices.

2. Capacity:

The capacity of any memory device is expressed in terms of: i)word size ii)Number of words

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