Classification according to level of processing
According to this classification, computer operations are classified as arithmetic operations and instruction implementation. Next, we talk about these classes of this classification:
Instruction Pipeline: As we know that an instruction cycle may consist of several operations like, decode opcode, fetch opcode, compute operand addresses, fetch operands, and implement instructions. These operations of the instruction implementation cycle can be realized by the pipelining concept. Each of these operations forms one phase of a pipeline. The overlapping of implementation of the operations through the pipeline gives a speedup over the common execution. Thus, the pipelines used for instruction cycle operations are called as instruction pipelines.