What are Different types of Registers in CPU?

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Introduction to CPU Register:
In computer architecture, the CPU register holds the key role which is small data holding place or memory, and is an integral part of the processor. It is a very fast memory of computer mainly used to execute the programs and other main operation quite efficiently. Register basically used to quickly store, accept, transfer, and operate on data based on the instructions that will be immediately used by the CPU. In memory hierarchy of a computer registers the top place and is fastest in manipulating the data. Numerous fast multiple ported memory cells are the atomic part of any register.

In basic or simpler microprocessors, a single memory location that is commonly known as an accumulator is present. Basically these registers are used to perform different operations. In a computer, these registers are used by the CPU to perform the operations
Different types of Memory Register:
-Accumulator (AC)
-Flag Register
-Address Register (AR)
-Data Register (DR)
-Program Counter (PC)
-Instruction Register (IR)
-Stack Control Register (SCR)
-Memory Buffer Register (MBR)
-Index register (IR)