Data transfer instructions in 8086 microprocessor

Data transfer instructions are the instructions which transfers data in the microprocessor. They are also called copy instructions. 

Following is the table showing the list of data transfer instructions: 

OPCODE	OPERAND	EXPLANATION	EXAMPLE
MOV	D, S	D = S	MOV AX, [SI]
PUSH	D	pushes D to the stack	PUSH DX
POP	D	pops the stack to D	POP AS
PUSHA	none	put all the registers into the stack	PUSHA
POPA	none	gets words from the stack to all registers	POPA
XCHG	D, S	exchanges contents of D and S	XCHG [2050], AX
IN	D, S	copies a byte or word from S to D	IN AX, DX
OUT	D, S	copies a byte or word from D to S	OUT 05, AL
XLAT	none	translates a byte in AL using a table in the memory	XLAT
LAHF	none	loads AH with the lower byte of the flag register	LAHF
SAHF	none	stores AH register to lower byte of the flag register	SAHF
PUSHF	none	copies the flag register at the top of the stack	PUSHF
POPF	none	copies a word at the top of the stack to the flag register	POPF

Here D stands for destination and S stands for source. 
D and S can either be register, data or memory address.

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