AX (AH/AL) - Accumulator
BX (BH/BL) - Base
CX (CH/CL) - Counter
DX (DH/DL) - Data
CS - Code Segment
DS - Data Segment
ES - Extra Segment
SS - Stack Segment
DI - Destination Index
SI - Source Index
IP - Instruction Pointer
SP - Stack Pointer
BP - Base Pointer