Final answer:
Concurrent control is the system in which two people independently input the same data for comparison to ensure accuracy. It should not be confused with biochemical feedback control mechanisms.
Step-by-step explanation:
The control in which two people key the same inputs into a system where they are compared is called concurrent control. This form of control is a mechanism to ensure that errors are minimized by having more than one set of eyes check the data entered. It is particularly useful in environments where accuracy is critical and errors can be costly.
In a broader context, the concept provided in the reference information talks about feedback control in biochemical pathways. This is a different concept and specifically applies to biological systems where the product of a reaction can regulate its own further production by inhibiting the activity of enzymes that contribute to its creation, thus preventing wasteful accumulation of substances when they are not needed. Feedback control is a crucial regulatory mechanism in metabolic processes.