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Primary Memory
This is the main memory of a computer. CPU can directly access this
memory. It is fixed on the motherboard of a computer. Primary memory
is further divided into two types:
1. Random Access Memory (RAM) ROM
2. Read-only Memory (ROM)
Random Access Memory (RAM)
RAM is a temporary memory. The information stored in this
memory is lost when the computer is turned off. That’s why it
is also called volatile memory. It stores data and instructions RAM
given by the user and also the results produced by the computer
temporarily.
Read-only Memory (ROM)
ROM is the permanent memory, i.e., it holds the data even if the system is switched off. It holds
the starting instructions that are required to start a computer. It is also called non-volatile
memory.
Secondary Memory
This memory is permanent in nature and is not directly accessed by the CPU. It allows users to
store data that may be easily retrieved.
Secondary memory devices are also called secondary storage devices.
Hard Disk
Hard disk is permanently fixed in the CPU Box. The most important
function of the hard disk is to store program files and data files.
Hard disk
Factbot
World's first hard disk was introduced by IBM in 1956.
Hard disks are available in a variety of sizes with storage
capacities as high as 5 TB (TeraByte) or even more. The CPU can
access data stored on a hard disk much faster than it can access
data on a CD.
External hard disk
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