Storage and Memory
It is imposible to process information if every bit came in and went out immediately.The information must linger for a while as the computer works on it thus need for information holdin parts.
There are two kinds of information holding places in a computer;some hold it while it is being worked on (Memory),while others hold information for a longer term(Storage).
Memory
It is divided into two:
1.ROM Read Only Memory. This is a permanent and instant available information to let the computer know how to start working when you first turn it on.This information is put in there by the manufacturer (Non-Volatile).
2.RAM Random Access Memory. Keeps information temporarily during processing. They are volatile. RAM is classified into two as per the technological composition
SRAM
. DRAM
Static Random Access Memory (SRAM)
Propeties
- It is faster than DRAM
- Is expensive than DRAM
- Is made up of transistors
- Is more reliable than DRAM
- Takes up more space than DRAM
- Holds data without external refresh for as long as power supplied to the circuit.
Dynamic Random Access Memory (DRAM)
Properties
- Is cheaper than SRAM
- Is slower than SRAM
- Takes up less space
- Made up of tiny capacitors
- Holds data continuously when refreshed by a circuit
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