Final answer:
High-tech machines used in fast food restaurants for customers to place orders are known as automated food ordering systems, reflecting workplace automation and technological advancements in organizing work.
Step-by-step explanation:
The high-tech machines you are referring to in fast food restaurants that allow customers to place their orders, pay for them, and then wait for their order number to be called are known as automated food ordering systems. These systems are a part of automation within the workplace, replacing traditional roles of employees with technology to achieve efficiency and cost reduction. The automation can be seen across various industries and is one form of how technology changes the organization of work and production processes.