Microprocessor
The relation among IC (Instruction Cycle), FC (Fetch cycle) and EC (Execute Cycle) is

 EC = IC + FC
 IC = FC + 2EC
 IC = FC + EC
 IC = FC - EC

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Microprocessor
When referring to instruction words, a mnemonic is

 a short abbreviation for the data word stored at the operand address.
 a short abbreviation for the operand address.
 a short abbreviation for the operation to be performed.
 shorthand for machine language.

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