An "open-loop" system is a type of control system that operates without feedback. This means it sends a command or input to a process, but it does not monitor the output or results. For example, a simple toaster is an open-loop system; you set the timer, and it toasts the bread for that duration without checking if the bread is toasted to your liking. In contrast to closed-loop systems, which adjust based on feedback, open-loop systems are straightforward and often easier to design. They are commonly used in situations where precision is not critical, such as in basic appliances like toasters or microwaves.