Whats registers

What are Registers in side the Micro-chip:
Registers are type of memory which are inside the micro-processor,they are used when the processor needs more than one operations inside the it.in term of memory they have highest priority.but small .Registers are consider the fastest memory because they are connect to the processor with internal buses instead of the external.They are so closet to the processor .Different types of registers are there in processor.
such as,Program counter,Accumulator,Memory address register etc.
There are 14 registers in the intel advance processor extended 88(iAPX88) architecture.