Primary memory is a memory that is directly programmed by the cpu
secondary memory is usually referred as
 removable storage media, hard drives and solid state drives

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PRIMARY MEMORY  - primary memory is the main memory of a computer system where data and instructions can be directly accessed by the cpu for immediate processing 

SECONDARY MEMORY-the term secondary memory refers to storage devices that are designed to retain data and instructions permanently . data in secondary memory is stored  by the user and is accessed only when it is required for any processing