Microsoft Management Console (MMC) hosts and displays administrative tools created by Microsoft and other software vendors. These tools are called snap-ins, and they are used for managing the hardware, software, and network components of Windows. Several of the tools in the Administrative Tools folder, such as Computer Management, are MMC snap-ins.
For more information, open an MMC snap-in, and then read the Help topics that come with the snap-in. Typically, you can access the Help topics by clicking the Help menu, and then clicking Help Topics.