What is mean by address in operating system?

In an operating system, an address refers to a specific location in memory where data or instructions are stored. It can be either a physical address, which corresponds to a location in the actual hardware memory, or a logical address, which is used by programs to access memory resources. The operating system manages these addresses through mechanisms like virtual memory, allowing multiple processes to run simultaneously without interfering with each other's memory space. This abstraction helps in resource management, security, and efficient memory utilization.