The document divides computer memory into two parts: primary and secondary memory. Primary memory, such as RAM and ROM, is temporary and can only store data while powered on. Secondary memory, like hard disks, CDs, and DVDs, is permanent and can store data even when powered off. The document also provides units of measurement for data storage, defining bytes, kilobytes, megabytes, gigabytes, and terabytes.

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4. Memory was Divided into 2 parts. They are:-
1. Primary Memory.
2. Secondary Memory.
Information about Primary Memory.
Primary memory is also known as Temporary
memory. This memory can store the data up to when the
power is off.
Examples:-Ram(random access memory).
Rom(read only memory).

5. Information about Secondary memory.
Secondary memory is also known
as permanent memory. This memory
can store the data even though the
power is gone.
Examples:-
1. C.D.(Compact Disk).
2. D.V.D.(Digital Versatile Disk).
3. H.D.D.(Hard Disk Drive). Etc….,

6. Memory Classification.
4 Bits=1 Nimble.
8 Bytes=1 Kilo Bite.
1024 K.B.=1 Mega Bite.
1024 M.B. =1 Giga Bite.
1024 G.B. = 1 Hepta bite.
1024 H.B. = 1 Terra Bite.