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Computers—Storage 1
and Memory Device
Goal Glimpse
Data and Information Computer Memory
Measuring the Computer’s Memory
In the previous classes, you learnt letters and numbers. Do you still remember
them? That’s because they were stored in your memory. Similarly, computers have
memory to store all the data and instructions required to perform various tasks.
DATA AND INFORMATION
Think of data as unprocessed, raw facts and figures, such as words, numbers, images,
and symbols. They resemble jigsaw pieces scattered on a table. Data by itself is
meaningless. Once the data is processed and organised, it becomes information.
Information gives a proper meaning. Examples of information are reports, graphs,
sentences, etc.
COMPUTER MEMORY
Computer memory is where data and information are kept. The Central Processing
Unit (CPU) gets data from memory to work on it. Once it has finished processing,
it sends the updated data back to memory for storage. There are two types of
memory:
1. Primary Memory
2. Secondary Memory
Primary Memory
Primary, or main, memory is where a computer stores data and instructions while
running. The CPU can directly access it. It is fixed on the motherboard. There are
two types of primary memory:
1. Random Access Memory (RAM)
2. Read-only Memory (ROM)
Computers—Storage and Memory Device 7

