MOV A, B
The instruction "MOV A, B" is a command used in assembly language programming, specifically in the context of microprocessors. It means to move or copy the value from register B into register A. This operation does not alter the original value in B; it simply duplicates it in A.
Registers like A and B are small storage locations within the CPU that hold data temporarily during processing. The "MOV" instruction is fundamental in assembly language, as it allows programmers to manipulate data efficiently and is essential for performing calculations and controlling program flow.