real-time clock

A real-time clock (RTC) is a small device found in computers and electronic systems that keeps track of the current time and date, even when the power is off. It uses a battery to maintain its timing. RTCs are essential for tasks that require timekeeping, such as scheduling events or timestamps. They ensure that the system maintains accurate time, which is crucial for file management, system logs, and proper functioning of applications that rely on precise timing. Overall, an RTC helps devices operate correctly in relation to real-world time.