Even though the instruction can be written in hexadecimal code, it is still difficult to understand a program written in hexadecimal numbers. Therefore, each manufacturer of a microprocessor has devised a symbolic code for each instruction called mnemonic. The mnemonic for a particular instruction consists of letters that suggest the operation to be performed by that instruction.
Example- the binary code 0011 1100 of the 8085 microprocessor is represented by the mnemonic INR A.
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