What roles do the processor, memory, receptor, and effector play in an information system?

In the context of an abstract model of an information system, the processor, memory, receptor, and effector serve distinct, essential roles in managing symbolic expressions.1

• Processor: This component performs several critical functions: it executes elementary information processes on symbolic expressions, temporarily stores input and output expressions in its short-term memory, schedules the execution of these processes, and modifies the sequence of operations based on the contents of its memory.1
• Memory: This element is responsible for storing symbolic expressions, which include the programs—or composite information processes—that the system utilizes.1
• Receptor: This is an input mechanism designed to receive symbolic expressions or stimuli from the external environment so that they can be manipulated by the processor.1
• Effector: This is an output mechanism that functions to emit the processed structures from the system back into the external environment.1

Together, these four elements provide a framework for understanding how both biological and man-made information systems operate by acquiring, processing, and disseminating information.1